This show is unlike anything you will ever see in an anime. At the start it just looks like an everyday shounen, but keep watching and you start getting attached to the characters and story. It can make you feel different emotions at the same time, and characters can be really easy to relate to (Minus the quirks). For age recommendations, i think ages 12+ is fine due to some violence, blood and minor language (+Mineta). If your just starting shounen, heck, anime in general, this is a great introduction. And with Season 5 just being released, there is even more story to look forward too...
If you would like to watch My Hero Academia: I recommend using VRV. All episodes are free to watch (Except the new Season 5 episodes, which become free as the get released), plus VRV has significantly less ads. If you already have, lets say, a Funimation subscription, use that. VRV is the best option for those who dont have a subscription to anything and dont intend to.
Overall, incredible show. Plus Ultra/10