[JMay]

One trick to remove stuck prints is to use a Stanley knife blade gently pushed under one corner, this breaks the bond such that you can then get the scraper under. Did you use any PVA glue or just printed straight to the magnetic sheet? Warm water also works. 

Your Benchy looks very good for a 1st attempt, these preset files are usually at 0.2mm layer height so running it at 0.1mm layer will show an improvement but double the time. 

Secondly the missing text is interesting doe the file have the text? as this is on the Creative Tools model is @0.2mm deep so would have expected to see something. You can check this in Cura in preview after slicing and use the R/H slider to go up and down the layers to see how many layers have the text outline but no infill. Final trick is to watch the printer do the first few layers is the nozzle scraping the bed or just above such that the filament is can deposit onto the bed in clear lines. 

Oh and body shells are well worth the effort as you can create your own custom versions that no one else has. 

Cheers
           John