https://www.mycryptosaver.com
It's a NZ company (so you have some recourse, and can easily communicate with them). You don't have to set up a recurring payment - you just get a reference for bank deposits that puts the crypto straight into your BTC/ETH wallets on a Friday. You can buy up to $2000/month. You can also purchase instantly:
https://support.mycryptosaver.com/ar...y-crypto-saver
If you're scared, do what I suggested earlier and just get a small amount each week.
If you do use an exchange, don't leave your crypto in there! Do your trading then withdraw again. I've used binance.com in the past, although I mainly just HODL rather than trade.