For beginners, you can buy coins that are not too expensive. I recommend a good coin and certainly profitable. You can buy doge, one and trx. Good luck.
Buy only small portions of your money to try how trading works, regarding to exchange if you can do some research first before doing this activities, exchange with good reputation and most used by traders is more likely to recommend, try a little bit and observe if you have the skills to enhance from this market.
It is good to explore other exchanges and not just stick into one. A lot of legit and reputable exchanges around and it is quite to see than isn't recognized by the community. The competition went strong and you will be amaze of what they provide services to their traders. Having with them will give us a better trades to experience. Never stop in 2-3 exchanges, keep moving and you'll found the best one.