before i could tell yobit is the best but when i see some pas accusation bad feedbacks on their thread well my guts to trade their got vanish since problems is not been solve immediately by them since their support is slow and inactive. So for both of you just be carefull on trading some alts since some of them got an issue to their wallet just stick to btc-alt then withdraw via btc so that both of you will not suffer some problems.
But even there so many bad feedback accusation on their thread which is yobit, still yobit exist and stand still. Though your advised was quite good as well, much better to be careful in it. So by making starting to make a trade it is always said starts from the basic learning in trading.