Hi again :)
Welcome to SaleHoo and thank you for your kind words about our community.
It's great to hear your enthusiasm about researching e-Commerce (and getting started!). It's a great way to spend your time while you are recovering from your injury. There's a lot to learn in the beginning, but once you get started it's so much fun and slightly addictive - whenever I take a break from selling online I really miss it!
Many sellers who start out on eBay get the same results as you did: Little to no profits due to fees and heavy competition.
I'm glad you asked about eBay alternatives in your other post because the truth is, while eBay is a great place for new sellers to learn the basics about online retail, it can be a bit cut-throat when it comes to making a decent profit. So do take a look at some of the marketplaces I mentioned.
I look forward to hearing more from you!