Hey there, fella. It was just your first go so relax and keep practicing. The DE89 is a great razor for a beginner and an experienced DE shaver alike - I am particularly fond of my original DE89L that I've been using since 2012. Nobody gets it right first time so just chill and keep going with it. Blades are so damn cheap and you can get way better than Derby's. If you PM me your address, I'd be more than happy to post you a selection of my favourites such as Gillette Platinums, Gillette 7 o'clock Blacks, Personna Supers (aka Lab Blues) and several others. Once your technique improves, shaves will get closer and you'll get used to the routine as well as actually enjoying this most manly pursuit. There are other very good razors out there but for now, just stick to what you've got, use a better blade, accept that it will take longer but also that you will get better at it with a little time. Double edge shaving for me has been a revolution but poop, I have had few face burners, some silly skin removers and confidence knocks. Keep at it, keep the faith, take a little 'me' time, relax and enjoy it. It's manly pampering and when your skill has improved you'll be mowing down stubble like a council gardener with a muckle new grasscutter . Lastly, absolutely no knee-jerk reactions or 'bugger this' fits. Seriously, it gets better, easier and the very routine can be steadying, comforting, fortifying, placating and just plain old magic.
Get in there, sunshine!