You won't know until you give it a go but those stats make it more difficult to predict your ovulation (typically 12-16 days before your period).
You can use OPKs on longer cycles (although this can get expensive) but if I were you I would just give it a go for a few cycles before getting technical. You could also temp to see if you are ovulating (some longer cycles can be anovulatory from what I have read) but again, I would just try for a few cycles first and try to have fun before getting technical.
Such problems are more common than people realise.
With cycles like those, you will likely find it hard in order to conceive (speaking as someone too who has always had irregular periods with resultant long non ovulatory cycles). With consistently long cycles as well you may not be ovulating at all (it is quite possible to have periods without ovulating).
I would talk to your GP about this and have blood tests done to see what your hormone levels are like; such long cycles can have an underlying cause. In that regard PCOS and or thyroid problems should be looked for in these blood tests. If either are there then they can be treated with the help of a gynae at a subfertility unit.