Easiest way to onramp if you have fiat in cash or a bank account and want to get LTC without having to pass some KYC procedure:
- Buy Bitcoin or Monero on a P2P platform like
AgoraDesk. Depending on your country and currency, the liquidity may be good or not, but most countries have a good number of offers. Another option is HodlHodl. If you have an European bank account then you can use also
MtPelerin. This is a centralized service, but it's in my opinion trustworthy and based in Switzerland, where you can buy up to 1000 CHF (a bit more than 1000 USD/EUR) without KYC.
- Use a non-KYC altcoin exchange (the one in my signature,
exch.cx is trustworthy in my opinion, but you can use any presented on the website
kycnot.me) to exchange BTC/Monero to LTC.
There is a direct fiat to LTC exchange called LitecoinLocal, but I can't recommend it (and much less to someone as young as you) because there seem to be very few trades lately and there have been even scam accusations against the owners.