This is really too vague to assist in any way. For some 6% may be too much; for others 10+% may be too much.
If you don't want high ABV brews then stay away from styles that typically call for high ABV- DIPA, RIS, barleywine, etc.
A quick and simple way to tell if a beer is high ABV is its targeted gravity. For example, a beer with an OG of 1.045 will have approximately 4.5%; 1.060 will be around 6%. It's a rough figure but gives you an idea.