As I mention in the comment don't fix something that work.

This is usual practice with (almost) all the things around us. Just keep your batteries charged, replace time to time the SD cards and (depend of the amount of photos you take) be prepared to replace the shutter. I know it is rated for 150000 actuations. But this is for orientation and your may last much longer.

The other thing you should do time to time is to replace date/time battery. But you can do it by yourself. Here is Canon manual, page 251.

Don't fix something that works.

This is usual practice with (almost) all the things around us. Just keep your batteries charged, replace time to time the SD cards and (depend of the amount of photos you take) be prepared to replace the shutter. I know it is rated for 150000 actuations. But this is for orientation and your may last much longer.

The other thing you should do time to time is to replace date/time battery. But you can do it by yourself. Here is Canon manual, page 251.