Cool. It's hard to know 100% how you'll react to any PED. I've written on this forum how I've found myself more likely to kick off and act out OFF gear than on (not that I'm walking around kicking ass but by way of example). ON I seem more chilled and perhaps more aware of how I'm thinking etc. Most of my bigger strength buddies are the same. Heck the more chilled they are the bigger they are - less catabolic hormones etc in their system so it's easier to grow.
However, the middleweight type guys and more average gym members and users at my local gym (including some with a couple of previous cycles under their belts) can, in my experience, find themselves only able to do what they want gym wise ON. Off... heck I barely see them. Yet we've an IFBB pro (and, as I said elsewhere some of by buddies from back in the day are 150kg plus and compete at a VERY HIGH level in strongman) who do train all round, do eat properly all year round and so on.
If, as it seems, you've (or anyone reading... we've a LOT of lurkers ha ha) little or no experience of SARMS or PED (or, as in some cases, highr dosages) then a mild to middling and relatively short first cycle should mean you're suffer few sides. Any issues with temper will be, at worse, short lived as will any potential side effects. It's also easier to be 'on point' with all the other aspects like nutrition etc etc for 8 weeks - although do try to be on point as much as you can post-cycle so as to keep the benefits and 'dem gainz' ha ha. Best of luck!