I play around some in that space and have been following it for several years. If you’re new to it and just want to get started the easiest way to buy some bitcoin is Coinbase. Setting up an account is similar to setting up a robinhood or venmo account. They will hold your coins for you which is not a big deal with small amounts, but historically has not gone very well (see Mt Gox hack). If you start to collect a more substantial amount I would transfer your funds to your own desktop wallet like Electrum (pretty safe) or a hardware wallet like Trezor or Ledger Nano s (very safe).