Dancing with bf

How do I get more comfortable jus moving. I think its really cute seeing married couples either dance in the kitchen while cookin together or even me doin a sexy lil strip tease or twerk for him. Theres been times he grabs my hands to stand and i freeze up cz ion know wtf I’m doin. Im very affectionate bt my family isnt so I never saw cute stuff like that. I go to twerk and I can standing up bt babyyyy my legs BURN and im so outta breath right away so there ain’t no way I can drop and get low 😂 and I cant even blame pregnancy 😪