Struggling with Late Isha and Early Fajr – Need Practical Tips

Assalamu alaikum, I’ve been a revert for around two years and only now am I working on keeping up with all five prayers. The issue is, in my area, Isha comes in at about 10:40 PM and Fajr at 3:40 AM. I fully wake up for it, but after making wudu and praying, I find it really hard to fall back asleep. And napping during the day isn’t possible for me. So how do you manage to pray all five on time without feeling totally wiped out? I’d be grateful for any advice. Jazakum Allahu khayran.