Id also suggest either TD or Interactive Brokers. IB will be a bit cheaper trading, but you will pay for their quote feeds. TD will offer you more help if you need it.
Even Robinhood will allow you to trade spreads No fees, no minimum account size, and instant signup. Just no margin. May be a good way to start and learn.
First time hearing of them.Can you buy option spreads as 1 order with them? Are they a good and reputable company? I generally believe in the saying good is not free and free is not good.
Robinhood is fine if you're just trading simple directional spreads. They're US only though. Surprised you haven't heard of them, unless you're not US based.
Tdameritrade and thinkorswim easy to set up the vertical Shows the limit spread, select what you want and send. If you don't get the trade you can walk up the limit until You get the trade.
All four brokerages I've used allow you to enter a multi-leg trade as a single trade, i.e., all legs are traded simultaneously. That includes Fidelity, E-trade, Ally Invest, and Robinhood. All of those brokerages then isolate the multi-leg positions in your account so that you can see the current market value of, for example, any given credit spread or iron condor, etc. With Ally Invest you might want to ask them to switch you to their "classic" account view for ease of viewing those positions.