Lesson suggestion for pracitcing head voice without tension

Hi, I'm a soprano and I've been singing for 2-3 years, and I've been struggling with head voice for a long time. I'm strong with my chest voice, but I struggle to sing head voice without tension. I would get tension even from doing lip bubble at those higher range during warm up.

So I'm looking for lesson suggestions for how to warm up/sing for head voice without tension, how to relax when there is tension. If there's any suggestions for songs to practice head voice, that would be great. Thanks.