FAQ's for Mint

I don't know the first thing about harvesting fresh spearmint leaves for fresh-brewed tea. I bought a few of your plants from Lowe's and was wondering if you could help. Thank you.

Mint spread all over my previous garden, and I don’t want to have this problem again. But I miss having fresh mint. Can I plant it in a pot?

Do I need to fertilize mint? What do I use and how much?

Can I contain mint with steel edging?