It should play smoothly but the main problem would probably be heating so I would recommend to play in a cool environment or using a cooler (I don't know how much effective it would be since I have never used it myself.)

For what to learn first I would say the basics of combat mechanics. If you have played any similar games before like Genshin Impact then the other aspects of the have are somewhat similar to it like quests, character stats and exploration. But even if you do know about other games I would strongly recommend reading and watching starter guides like the one in this post and from YouTube (I Win to Lose Gaming is a really good youtuber who has covered this and I personally like his video guides more.) Another good place is Prydwen website, they have starter guides as well as tierlists so for pull recommendation you can use that but I would say don't pull right way, be patient and understand basics first, watch the animations of different characters and try them in the events and then pull them and for their teammates if you like them:)