Good grief, not 25 bucks! lol If you really want to do this, do your 'homework' first so you can be successful.
These three look like you're getting the subject posed nicely and getting the photos framed and composed but the technical part seems to be what you could still work on. The first one is so dark, I think you need to get consistently good quality with your portraits.
I'd suggest you take time to figure out your pricing, see what other portrait photographers in your area charge etc. so you can price within range, not underpriced. But your portraits need to be the quality that you can compete with other photographers and provide good quality portraits that people are wiling to pay the going rate for. I think people tend to 'like' just about anything and everything, and sure they'll take photos for free or next to nothing, but will they book sessions and pay?
It might be worth spending some more time developing your skills and meanwhile look into everything that will go into doing portraits - deposits, contracts, releases, insurance, etc. What will you do if they drag their feet paying? (if you give them photos I don't know that there's any getting them back if they never pay the full amount they owe). How will you handle it if they keep wanting to cancel/reschedule? (get that covered in the contract...) What will you do if they don't like the photos? (you don't need one pissed off person trashing you all over the place before you even get this off the ground).
Try ASMP or PPA for info. for professional photographers, sample forms, etc.
American Society of Media Photographers You seem to have a lot of enthusiasm if you can direct that into developing your skills further and in getting yourself set up in business in a way that you can enjoy it and be successful.