Keep in mind there are not an unlimited number of D1 scholarships floating around. It is very competitive. Not saying to give up just want you to know how much work is ahead of you.
First off 90% of your time working on baseball should be working out and practice. Only 10% of your baseball time should actually be playing in games. The time you spend improving yourself when not playing in a game is what will make you get noticed. Practicing a couple hours a week then playing in a couple games wont cut it…
Aside from pitching during the week you should work on excercises that strengthen your core first and foremost. Lots of resources on youtube. Then work on strenghtening every thing else. Again you can search youtube for pitcher specific strengthning excersises.
For pitching you should really work your mom over until she agrees to a pitching coach. It can be expensive. But some coaches offer to work with a couple of kids in a session which saves money. You may learn to increase your velocity on your own but you may end up using your arm more than your legs for example and could damage your throwing arm. Even if you can only get two sessions a month that will help a lot.
Getiing on a college team also will take a lot of work. Playing on a rec team wont cut it. Check around your area for travel teams that have plans to get exposure where they go to play in tourneys where college coaches are invited to scout. That can be expensive as well so at a minimum work your butt off over the summer and get on your high school team.