Meimei,
I have only been growing for just under two years. I hate science and botany, but am the chef sort if that makes sense. My grows would win no awards, but I have a stable, safe system and comfort that I will take a plant to harvest.
Your first grow will be a learning experience. Any harvest is a win. the more research you do the better. And like most things in life, planning and a little investment drastically improve the odds of success.
get your whole layout planned an in order before you start popping seeds. I recommend a tent of some sort. Mine is built primarily out of PVC and reflectix insulation from lowes.
The terrarium idea sounds loco to me though maybe I am not pondering correctly. You need ongoing ventilation. You will need odor control/exhaust.
As for seeds, I don't enough under my belt to say. I do not recommend the Barnies Pineapple Chunk. If you need to keep it small, from limited experience the cheese varieties are good. I had a g13 cheese (but came from attitude) that i wish I had cloned. I think there is a good deal of variation from crop to crop with the seed companies. And the vendors have little control over that. But I liked Herbies timing and stealth methods. Cool stuff for my kids in their stealth