I Would Like to know that can I choose Trading (Futures & Options) In Stock Market as my career if there is no haram in it?

If yes, please do let me know what things should I keep in mind while trading? What will be the khums rule & all other things.

Yes you can. You can't do in haram things like alcohol, pork and according to fatwa of agha sistani you can't do bussiness in forex and cryptocurrency