Good news: you already know both halves. The perfect — perfekti — is the present of olla plus the -nut / -nyt / -neet participle from the negative past:

		English
minä	olen oppinut	I have learned
sinä	olet oppinut	you have learned
hän	on oppinut	he / she has learned
me	olemme oppineet	we have learned
te	olette oppineet	you have learned
he	ovat oppineet	they have learned

Same split as before: olla shows who, the participle shows how many — -nut / -nyt for one, -neet for more.

The negative just adds the negative verb: en ole oppinut, emme ole nähneet — I haven't learned, we haven't seen.