I would also learn the piano. You don't have to become amazing at it, but learning the basics can really help you. It makes you more musical, which is an important skill alongside your production skills. Your DJ background will obviously help you in making your beats and rhythms, but learning an instrument like the piano will really help with creating bass lines, more interesting chord progressions, better synth lines etc. etc. All of which will make your tracks better as well. It takes time and patience though to become good at making music, whatever the genre. If you want to make tech-house and remix stuff, then Ableton Live is perfect for you. Rich.