My Oxford Compact dictionary defines progress as forward movement, advance, development, improvement and almost everyone seeks it in many areas of life. Despite the straightforward definition, it can be hard to define if you’ve achieved progress. Not everything can be measured… Even when it can be, progress can genuinely be slow. What matters overall is that there is some!
As for success, the dictionary defines it as accomplishment of aim, favourable outcome, attainment of wealth/fame etc.