Need advice

Ok I know this is crazy . I've always been self conscious about my body. Hated it! Now I am with my amazing boyfriend and he's helping me. He makes me feel beautiful and he compliments me every chance he can . I send him nudes to keep things interesting while he's at work. But I know sometimes showing just a little bit can make them go even crazier. My question is how can I take sexy pictures without involving someone else and isn't hard to take. I'm not camera savvy and I have a huge phone (note 5) . Girls do yall have any ideas to help me out.? Apps? Sitting the phone against something so you can pose? Help please. I want something new to send him.

Additional info: I'm 20 he's 35 been together 2 1/2 years

I'm 5'7" 170lbs

Don't know if that matters haha. Thanks everyone