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Regarding the Monoprice Select Mini, this fellow has started up some very useful videos for beginners and plans to do more. The video on bed levelling is a good place to start.https://www.youtube.com/channel/UC2qAHal8kbvnjk4bbhtZWew/videosMonoprice Select Mini also has a facebook page and there is some good information and conversations there as well.https://www.facebook.com/groups/1717306548519045/
I've been coming up to speed on Fusion 360 from Autodesk. It's free for the hobbyist and casual user and is very full featured. Have said that, it's also a pretty steep learning curve, but there are lots of videos and tutorials on youtube.