Suggested reading/research for noob

Considering starting up.

Any suggested research?

My background is in inventory and purchasing, however I’m not currently working in those fields.

I have a wholesale source that I could potentially start small with (~200 units, less than $1500 purchase) which is ideal for me. I would at least like to run through the process with one product, feel it out and see if it’s for me. I really want to do more research and reading first.

Also, I know a ton of people use Alibaba/express. What’s this subs opinions and experience with these wholesale overlords.

TIA