A digital computer chord-making tool can be very handy because the computer, being a computer, will always produce the correct chord variation the very first and every time. But I think that you should still also spend the time to understand the fairly-simple basics of "how the trick is done."
One of the "classic" way that music students used to be taught this was to have them learn how to read music and then to study "classic" scores. There were various "classic" composers who pioneered many of the things that we use today, and if you can read music you can see how they did it even without playing it.
Today of course you can go one step farther – downloading digital copies of those scores which are now in the public domain into your favorite music-scoring tool (mine is the absolutely-free "MuseScore"), and have it play them – perfectly, of course – while you watch. (The "MuseScore" web site references a very large project which is dedicated to doing exactly that, for educational purposes.) Logic also recognizes these industry-standard digital file formats. A few modern bands have even licensed their own music for this educational purpose: you can tear it apart but can't sell it.
"I wanna quit being a computer consultant and become a composer and arranger at age fifty-nevermind."
Logic Pro X, MacBook Pro, 88-key MIDI controller.
Just south of Chattanooga, Tennessee, USA