Hi Omar,
Welcome to Empire and Croeso i Navarr.
Hope you’re having fun so far. 
I’ll offer some help and feel free to find me In Character if you fancy a natter (Yaya’s Prosperity Pavillion with the Ffwrdd Allan Yna).
There’s no “good/bad” answer here.
What may seem to be entirely safe one season, could be on fire the next season eg Miaren. So having a nose around the territories section and going with what vibes best may be a good guide.
Briefly:
Hercynia - Cold, mountainous, good distilleries, BIG Library, fir & pine forests
Miaren - The neat “civilized” Navarr. They have/had a city “Seren”, they have no Vallorn, please try and ignore the gaping hole in the ground, and the fact that the Cold Sun are making it VERY crispy
Therunin - The Empire’s Florida. Swamps, giant flying/stinging/biting insects, dire crocodiles, famed Navarri Hero Red Hound has retired there, and the presence of the Embassy for Axos means it’s full of Drug Dealers. I may challenge the Senator for Therunin to build some sort of Park of Amusements Great Work. 
Broceliande - Vallorn, more vallorn, EVEN more vallorn…Navarr & Thorn. Come see the Terunael Ruins, they’re lovely. Known for intimidating Vates and angry thorns.
Liathaven - The territory so good we cursed it twice. Seriously, there’s like a 30-year curse we slapped on this forest. Currently in Jotun and Vallorn hands. Some Feni. Produces many of the meanest, and angriest Thorns in Navarr. Quite Grumpy.
By the sounds of it, you’re currently Solo Striding in the Navarr.
With the Spring Welcoming coming up at E2 it’s a great time to look for a Steading or Striding to call home. Listen to the Great Dance, see where it takes you. Did I mention my Banner is recruiting? 
Brocelinade and Liathaven both have -50% production nerfs due to being conquered. However, just like Miaren suddenly being invaded, the next winds of war & fortune could see a region recaptured and suddenly you’re back at 100%. The game is in the field, downtime effects on your production just encourages you to care about what’s happening. If you don’t have enough herbs, someone in Navarr will have some to sell.
Which is why you can’t take 5 steps in Anvil without someone wanting to sell you a flapjack, brownie, cookie, bun or other baked good.
Don’t worry about the points. I know people who literally came in having spent no points. They roleplayed with lots of peeps, had people show them stuff like they were in the academy and made a decision about who they were later.
As an Artisan I found it useful to theme my recipes (I specialise in combat items for people without hero points). You may find something similar helps as an apothecary…
Are you an Elixir Vitae Vender, is it Scop’s Mead for the Thorns, Mageblood and Vate boosts? Are you slightly twisted and looked at all the poisons? To learn the antidotes…but you know alllllll the poisons and venoms.
Physick/Apothecary/Herb Garden is not an uncommon build in Navarr.
You’ll often see them at the Vines council with pouches full of Marrowort and True Vervain.
Vines are mostly battlefield healers. However, there are only a few Navarri physicks in the Hospital. So well worth a look. A great place to role-play, find out about the IC healing arts, and meet people from all over the Empire.
Many of them may be screaming, bleeding out or having some form of surgery carried out on them. But you will get to meet them. 
As Geoff says, don’t worry about it.
More than many Nations Navarr is a choice not a birthright, and with the Great Dance you may feel called to many places and roles in your life.
I used to be a Broker, everybody thought I was a Thorn, now I’m a Brand.
“I don’t know” is a perfectly legit answer,
When it comes to potions there is no hard and fast rule on dosage, size etc.
There are some amazing phys reps out there.
I’ve bought potions with realistic drinkable phys reps.
I currently like the little coloured wooden tubes with a cork that one for the traders was selling.
Phys Reps cost money, living is expensive. Having a few cheap 10ml glass or plastic bottles with some diluted food colouring in and a pouch/box for your lammies is great.
Do what you can.
Or ask other players about how they do it.
The Apothecary Guild between the Brass Coast and the Imperial Offices is worth a look.
Skill Tree is among some great You Tube channels for LARPers.
Here are their:
Alchemist Kit Build
Travel Tavern Box
IC Coffee Kit
Hope this and all the other advice helps.
Have a fantastic time and never be afraid to ask questions. 