Curious and in need of assistance

Hello all! I don’t post on Reddit, so please bear with me. Little intro, I’m a 34F and my husband is a 45M. We’ve been married for 10 years, together for almost 13. We have a great relationship, but have never talked about opening our relationship or becoming poly. I’ve been thinking about, at least, opening the relationship, on and off, for a few years now, but I have no idea how to even approach the subject. Our libidos haven’t always lined up and I just want help and take some of the pressure off of my husband. We’ve tried just about everything to help him “get in the mood”. But when he feels pressured into it he doesn’t want to do anything and I 100% understand. It’s not fun when it feels like a chore. I don’t know… is it worth it? How do you make it work if it is? I also, don’t want my husband to feel like I don’t want him, because that’s TRULY not the case. He’s my person, my best friend… my home… I’m at a loss so I turned to the Reddit community.. hopefully y’all can help shed some light on how you did it, if your situation is close to mine, or just flat out tell me not to do it… Also, feel free to ask any questions. I’ll try to respond back as best as I can. TIA!