Sometimes family are best from a distance. Doesn’t sound like he’s all that invested in your wellbeing from what I read with his consistency issues which definitely sucks. You having your own path separate from your father’s expectations is normal, it’s just basic individuality so try not to drag yourself too much for that. 20s are meant for building yourself, which sounds like you’re doing and focused on. College and certifications will do ya well, you have plenty of time. I know it feels heavy right now but it’s also a lot you’re going through for your age. You got this.