We are a family with several musicians. My husband took violin lessons starting at age eight and then taught himself to play guitar in college. He actually makes money entertaining playing the guitar and singing, he’s that good. Our son took lessons (and was in school band for eight years) and plays just about any type of percussion instrument but mainly steel drums now. He did play the marimba in high school (very well, I might add, to the extent that playing his UIL solo at a college try-out earned him a several thousand dollar scholarship).
If someone was interested in taking lessons but didn’t have much time or wanted to learn at their own pace, there are beginner guitar lessons available online. Violin lessons would need to be in person, though, because how one holds the instrument is very important as well as technique. I’ve seen online drum lessons but not online marimba lessons. Before anyone considers music lessons for themselves or their child, though, they need to remember that the desire to play and the commitment it takes are very important aspects of learning to play an instrument.