To adjust status and become a permanent resident, you need a number of forms as mentioned in guide shared by @Crazy Cat.
Only adjust status if you're going to settle and live permanently in the US.
You need to file at minimum I-130, I-130A, I-485, I-864 and I-693.
Considering you want to travel while adjustment is pending, you need to also file I-131.
Considering you want to have employment in the US while waiting for GC, you need to file I-765.
All of this is DIY. However, if you get overwhelmed, feel free to ask more questions here on VJ.
And if after that you're struggling, you may hire a lawyer (member of AILA)