I trade futures at U.S. Plus500, I highly recommend.
No data fees or inactivity fees, so you can leave your account idle for a month if you go on vacation or have other commitments.
Only downside is desktop platform is a bit awkward, but mobile app is good. Try the demo first.
And daytrading margins are low: $1,000 for NQ and $500 for ES. Sure some brokers may be slightly lower, but they have all these other fees and restrictions.
One other thing, futures brokers commingle your money with others, so financial strength of the broker is very important. Plus500 is a $2 billion publicly traded company due to their huge money making CFD business overseas. So you can easily deposit say $100,000 with them and sleep at night.
There are other smaller futures brokers, where I wouldn't dare keep $100,000 with them.