Best tips for lowering LDL and raising HDL?

I will preface this by saying I have FH. I have been on a statin (rosuvastatin 20mg) for many years. My LDL levels always hover between 100-140 (140 was my highest in quite a while and it happened recently after I lost 30 lbs).

I’ve read that people with FH should aim for under 100 and I’ve never been under that so naturally I’m a little stressed since I’m in my 30s now. I have an appointment with my primary soon but wanted to post here to get some insight.

What are your best diet tips? I feel like I’ve been a little loose with my diet recently. I’ve dropped the calories but haven’t necessarily looked at any of my other macros or been strict about that.

If locking in on my diet can’t get me to knock that LDL down a bit, what’s some medication I could potentially ask my primary about so I can try and be more proactive in my care?

As far as HDL goes, mine has always been low and I don’t know what to do to get it up. I read exercise helps but it doesn’t seem to change mine.