The second photo looks like there is some underextrusion involved too.

Might want to tune a couple things;

• Levelling the bed
• Use a slicer like Cura or PrusaSlicer for more settings
• Calibrate dimensions with calipers by printing a test cube
• Calibrate extrusion/E steps (should help with the underextrusion / voids on top)
• Adjust your retraction
• Adjust your filament extrusion multiplier
• Adjust your printing temperatures
• Make sure to grab the purge at the start that some printers do
• Adjust your first layer settings. It appears as if the random bits are from the first layer. Might not be but couldnt hurt to adjust in any case
• Brims are typically more than enough for prints but a raft could help with larger things with significant warping
• If you have a heated bed, make sure thats on
• Some smaller settings like “avoid crossing perimeters” or “z hop” might help.

I have very little experience (6 prints so far on an ender 3).

When is the last time you’ve leveled your bed?

I had a similar tubing issue (no idea what the term is) where there would just be random tubes off the objects body.

I manually leveled and printed again and the print came out fine.

Good luck

The third photo is the bottom, right? It sounds like you’ve made the correct conclusion, that you need to calibrate the nozzle-bed distance better. Especially the dark filament looks like it was printed while the nozzle was too far from the bed. However I don’t know how you adjust this distance on your printer. On a normal printer with a single nozzle and no probe you would do this by levelling the bed at a different height. On a printer with probe you adjust the “probe z offset” setting in firmware. But since you have dual nozzles there’s probably some kind of calibration/levelling procedure specific to your printer that you need to follow. The transparent filament looks like it was printed at a better distance.

I would suggest that you try to improve the first layer before tackling the issues higher up.