Yawwww....finally you get something from inside of you I think, the green onion just need to plant into the soil, no need to put it directly to the ground, put in the pots (or something you can change to be pot)

1. Would you recommend growing fruits, vegetables, or herbs first?

I recommend to grow vegetable first, because you will harvest it in short time, it will boost your spirit of gardening, next step you can start with dwarf orchard in the pots

1. Is there something that I can grow indoors?

you can grow spinach or water spinach indoors, if you use poly bag or pots, but basically many kind of vegetable can be grown indoor

1. Is there something that I can grow in pots?

yes, dwarf orchard mostly can grow in pots, vegetable too.

1. What advice would you give a wanna-a-be gardener?

just plan those thing, no overwatering, because if you plant thing in pots, soil nutrient could be easily flowing out with the overwatering, and you need always to put fertilizer.

look at this pics, hope you will have more idea:

you can start it with 10 mineral water glasses, wish you luck @sumatranate