Here’s another dumb strategy that I used to use back in the day when I was A) skint, and B) using a consumer grade camera that didn’t have all the zooty bells and whistles like remote shutter compatibility.

For long-ish shots where you don’t want the camera to vibrate, you can use the self timer as if you were going to take a group photo. Just, minus the group. Set it to whatever its shortest interval is (as I recall my crusty old Powershot A70 could go down as low as two seconds) and that ought to be plenty enough time for your fingers to be off the camera body and any vibrations in the tripod, etc. to settle down.

There is an extra special cubicle in hell reserved specifically for whoever is responsible for the Canon Connect app. So these days I use this remote release and it ought to work with your camera body as well. Not, notably, any of the wireless ones. The plug-in one works on time 100% of the time and isn’t yet another battery to have to fiddle with, never experiences mystery interference or connection issues, and most importantly is only $9. Me personally, I never need to be far enough away from my camera that the length of the cable ever becomes a concern. It’s around three feet long.