I think this will be a good website for newbies to learn and practice trading. I had my first trade in coinex when I was new and it was terrible I lost some money since I thought I can trade because I've read some and watched somw lessons on trading. This will really be helpful to simulate and be familiar in trading.
This is useful, but won't help much since actual experience is gained by actually trading. Learning strategies and perfecting them through real world usage along with usage of bots is the primary way for anyone to learn trading in such a volatile environment.
You badly need some practical skills to be good at trading. This is very important and there might be certain website like you mentioned that might be good for newbies but I think sooner or latter they have to enter the real market with good real profits so it is I think more important for someone new to invest low capital in altcoin good to gain value and be in the mainstream. It is called learning by doing.