I trade through forex for so many years now. I would like to try crypto trading. What platform would you recommend to me? Or maybe what's the best you haved used? And also can you guys give me tips while starting?

You shouldn't thingking to earn on this forum. This forum should not be used to earn money. This is purely for learning. You should start to think learning from here. And then used that knowledge you haved learned here to earn money.

You should start reading and reading alot on this forum. Keep learning and learning that's the only secret to success. Don't try to jump through hard things trust me you will not get any further. That's based on my experiences.

I am Currently working here in Saudi Arabia. Where can I invest small amounts of my money online? Give me some suggestions.

I don't think so. because those crypto are just copy cats of other and they are just naming it. 95% of them wont survive i believe for that.

Obviously take time to read their whitepaper, gather some research about it and get some feedbacks about those coin to other members.

Don't start to think how to "earn" before that you should first start reading and learning here.

For a newbie. you should first read a lot. read the rules here. and you should not think of making money here in bitcointalk. Please read a lot and learn a lot for now. that's what im doing as of now.

I dont understand anything. so for now now i take lots and lots of reading about discussions and tutorials here in bitcoin talk. It's very frustrating but with lots of reading i am able to cope up and learn a lot of things here in bitcointalk