Almost every brokers like hfm, xm, lmfx, exness, etc allow news trading these days however we need to be careful while trading the news events since they carry a lot of volatility in the markets.
That's your choice, i hope you making some good profits with the free capital. Have fun and be safe because nothing is free in this world and if you get it, enjoy!
We can use a demo account first to test their processes and then small amount to further test those processes which can't usually be tested on demo like withdrawals etc.
I think bonuses can be good however they come up with some terms and conditions so better reading those terms and understand them before availing these bonus credits otherwise it become little difficult to reach the required thresholds outlined in the bonus terms.
Some brokers like hfm etc offers leverage of up to 1:400 on regular and 1:1000 on micro accounts while some crazy offers in the market like 1:3000 which seems pretty unrealistic to me. New traders being unaware of the market conditions should keep the leverage low because it may bring damages as well.
Demo accounts can be helpful in knowing the processes without depositing any money with the brokers and if finalize the right one always go with small to further test the processes like withdrawal etc which usually can't be tested on a demo.