Can a child with a disability take part in ordinary lessons and classes?

Yes. Many children with disabilities take part in lessons they're interested in. What matters is "whether it suits the child." Trying a trial session, choosing a small group or an understanding instructor, and discussing needed accommodations in advance make it easier to continue. Seeing it as a place to widen "fun and likes," not only skill improvement, broadens the options. If it doesn't fit, it's fine to change; trying a few, you'll find one that suits.