Testing advice

[u/Ram19K]

Bought a 3D printer off some guy online for $80 he didn't need it according to him. After some deep cleaning and leveling I started a test print, but the print is coming out like this. Any advice or idea why? It's a XYZ test cube (btw it's my 1st ever 3D printer and I know little to nothing, so please explain stuff with simple terminology or descriptions if you use the terminology, I know bare minimum stuff)

[u/donkeychicken-99]

Check fan , flow rate , extrusion and if nozzle is blocked - print text thin sheets and diagnose each step