if you have the cash, you can go to a gas station / pharmacy / supermarket / any store carrying gift cards, and buy a prepaid visa for like $25 or whatever, the visa activation fee shouldn't be over like $5 and you can use it with paypal too
$10 + $14 for league fees and 2 months of premium should last you the regular season
if you need to pay for premium only you can buy steam gift cards from just about anywhere and use that to pay for premium since esea is on steam now too
I know getting money in cash might be hard but idk ask your parents for money if you go out with friends and buy food or whatever or buying books from the school bookstore or whatever