All acrylics have their own thinner and some have their
own cleaner also. Check the label for the recommended
thinner/ cleaner and try that first. If water is ok try Sodium
free distilled water . Works great for paint and decals.
Try different paints to see which you prefer. Practice
on an old model or sheets of styrene. Practice. Also need
ventilation , a protective mask and gloves. Hope this helps.
Fuzzy