What results can I expect from scar removal and which procedure would work best for me? (photo)

The ideal window of time for treating scars from any cause is between the end of week four (when the area is healed enough to withstand treatment) to the end of week twelve (after which the scar is defined as a "mature" scar). If treated during that eight week window there is a chance for very significant improvement in appearance. If treated afterward between a 60-80% improvement is the most that typically can be expected.
When it comes to surgical scar revisions, particularly in areas subject to muscular tension or movement, the there is a significant risk for the subsequent development of stretch scars and even tram track stitch marks.
Subcision, which requires no cutting on the surface of the skin may be used to elevate and smooth the scars and professionally performed manual microneedling (no need for the added expense and risks of RF microneedling) may be used to better blend any residual surface, superficial color and texture irregularities with the surrounding normal skin.
You would be wise to consult with a board certified cosmetic dermatologist scar specialist and be wary if hawked this or that supposedly "next big thing," expensive fraxel laser, RF or ultrasound devices, as the hard science to support the use of these gizmos lags well behind the heavy marketing hype and social media buzz to promote them. Hope this helps and best of luck.

I appreciate your concerns, however you must realize that scars cannot be completely erased, but can be camouflaged and improved so they are not obvious. In person examination would be needed, but it appears that your photo may demonstrate an acne scar amenable to scar revision, which would be excising the scar, and closing the wound carefully to minimize the new scar formation. This can be performed in the office under local anesthesia. Come see me or another board-certified plastic surgeon in our area to explore the best options for you.