Learn C, F, G, G7 and Am chords first. There are literally thousands of songs written in the key of C using some or all of those 5 chords.
Once you can finger those chords reliably, then practice changing from one to another. You can do this muting the strings with your right hand and then making and changing the chords. Start with a C change to an F. C to G. C to G7. C to Am. Then start with the F. F to G. F to G7. F to Am. F to C. And so on.
Do it systematically so you wind up changing from each chord to every other chord. Over and over until you build the muscle memory and it is easy for you to do. You can do this while watching TV with the strings muted. Try to make the changes in time one, two, three, four. Do it every day. For at least 10 or 15 minutes.
You can play some easy songs that use these chords. You'll be jerky and hesitant at first. But you'll be surprised how quickly it smooths out as you get better at making the chord changes. Tap your foot in time with the song and strum with your index finger: Down, down, down down. and Down up, down up, down up, down up.
When you have this grooved, you can learn additional chords and practice changing them. Major chords, Minor Chords, and 7th chords are the most commonly used chords.
After that you've got a great base upon which you can build your skills.