Be brave!! Remember that's there are no limits to knowledge, the only limit could be your will!!
https://learnenglish.britishcouncil.org/grammar/intermediate-to-upper-intermediate/present-perfect-simple-and-continuous
https://elt.oup.com/student/solutions/upperint/grammar/grammar_01_012e?cc=it&selLanguage=it
https://agendaweb.org/verbs/present_perfect_continuous-exercises.html