Your idea is a good one, since everyone who drives a car should have basic knowledge of what to do in an emergency, like mounting a spare tire, using jumper cables, etc. The owner’s manual for your car should explain these basic tasks you may need to do on the road. If you don’t have an owner’s manual it should be available online. AAA is also a good thing to have but you might have to wait an hour for them to come. Of course you should always have a fully charged cell phone.
Make the best use of your time and read the owner’s manual to know what preventive maintenance is expected, and leave the non-emergency repairs like oil changes to the professionals. If you are concerned that your lack of auto repair expertise makes you an easy mark for an unscrupulous mechanic, bring someone knowledgeable with you when going to the repair shop.