Synonyms of tinker in English:

try to improve, try to mend, work amateurishly on, fiddle with, play with, play about with, play around with, toy with, trifle with, dally with, dabble with, potter about with, fool about with, fool around with

tamper with, interfere with, meddle with

tinker at the edges of, tinker with the edges of, adjust slightly

informal mess about with, mess around with, rearrange the deckchairs on the Titanic

British informal muck about with, muck around with