Binance is the biggest exchange by volume with about 80% so I would make an account there just to have it. The credit card with 1% cashback or more if you stake bnb is also a nice feature.
My ref
https://accounts.binance.com/de/register?ref=75517763

There are a few other exchanges or you can probably buy USDT/USDC andswap it in the wallet or on a dex like even apeswap
https://coinmarketcap.com/de/currencies/binance-coin/markets/

on singular.farm you can also farm the same coins recently the interests have been higher, today it´s lower. I think about investing in copycat again and am searching for another alternative right now