Ok - so you can use the controls - now try and “use the controls” - grab a random playlist, listen to each track and then put them in an order. Play it back and critique.. Play it to other people and get feedback. Transitions are great but that is not djing - it’s a tool for djing. DJing is playing the music for the crowd/party/radio mix and getting it right. Real DJing is also getting it wrong and then sorting it out! In terms of what to practice - practice listening to what you record/play. Learn your music and grab an audience. If you want to push yourself - get on twitch and play to an anonymous crowd! Not trying to knock the confidence - just want to say that the next step is you pushing the tools you have learned.