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.