Not at all a full time option trader however I use both degiro and IB.
I use degiro and boy yes it is cheap and you notice it's cheap. therefore I don't trust them with all my money.
- The good and badish part is that Degiro is execution-only 🤷♂️
-Option trading hours are eu hours so market closes at 6pm, yes also options on US stocks/ indexes.
-No premarket / aftermarket info or trade possibility.
- They have moments where the platform malfunctions.
IB has way more products you can trade.
IB has many statistics and reports it automatically makes for you while at degiro you will have to calc all those yourself in excel/ other. If there is a corportate action like a div/or extra shares IB will let you know degiro won't by default you get the dividend.
Also, I opened a broker account with IB when I was 18, and I had no income just the minimum amount of money needed to open an account. I don't think they do a lot of checking. Just try!