Need some major hair tips please!! 🙏🌺 - from a non girly girl

So I’ve never taken much care of my hair, buuut I wanna make change and I have no idea where to start

Little bit about said hair:

• strait type hair but some days decided to goes wavy?
• gets oily barely a day after a wash
• very thin :( can see bit of scalp in my middle part
• gets washed 2-3 times a week

What I’m wanting:

• more hair growth, I don’t want to be balding

• smoother shinier hair?

• just healthy hair in general

• Oils? Masks? Shampoos? Conditioners? Anything honestly that can help me achieve what I’m wanting?

Don’t care too much about prices, so long as it works and won’t break the bank