Anyone good w finances advice on finances/tips on improving credit score greatly appreciated ☺️

I’m currently 19 & 4 months pregnant w my first baby, I’m really trying to buckle down on my finances. I will be a single mom and doing things by myself other than living w my mom until the baby is a few months old, while some people think it’s inappropriate to put your finances out there I am going to for the fact that I would love advice specific to me if anyone good w finances has any tips. I nanny 3 hours a day Monday-Friday & have a set pay of 250 every week from that & i also just got another job serving part time at a pizza parlor which brings in about $100 weekly only bc its very few hours. From nannying i save $100 weekly, the rest on necessities & I just got the 2nd job for the big baby buys such as car seat, stroller, pack&play, baby furniture, etc. & then I plan on quitting when I get closer to my due date & get too uncomfortable to be working. I have a discover credit card that I gave to my mon to put up & have just started paying off also, any additional advice on what I could do to improve my credit score quicker/just kind & positive advice in general is greatly appreciated!

(BTW- I plan on going to technical school for phlebotomy once I have my baby but the ones close to me won’t allow me to while I’m pregnant bc I would be going on maternity leave as soon as I get hired in somewhere, i know my income now wont be enough once I have my own place I just have been very sick and don’t want to be working 24/7 so right now I’m just doing what I can)