need affordable skincare routine

im 18f and have never done any skincare before thought maybe with time my skin will be okay
i have combination skin and before i used to have so much acne now its just some randome day pimple pop up
but little bump on my forehead is constant
still my main concern in tanning and acne scars and its too much everyone tell me that it looks like i have hyperpigmentation i really wants to fix it but dont know anything

and need sunscreen cuz i have used 2 3 sunscreen 1 was too oily another was good but did not help with tanning so suggest that just settle onto the skin and does help with stopping tan

plsss help