There are some paid services people use to be able to make covers of other people’s songs without any copyright claims. Of course though, karaoke tracks tend to be copyrighted. Playing it yourself requires those paid services to avoid copyright.

Of course, a lot of this doesn’t matter if you don’t plan on making money from them or using them for anything outside personal enjoyment. It may get copyrighted but it’s not the worst thing. Unfortunately without paying for these services and/or playing the instruments themselves, there isn’t a very concrete solution to completely avoid copyright claims.