My little brother came out to me, I want to get him a gift

My (16) brother told me he got a bf and I want him to feel like I’m supporting him. Should I be worried about my parents finding out? Should I get him something? I’m a little confused on what to do. I got him a heart lollipop that I thought was cute but I’m going to do something else. I want him to know I fully support him. We have never been on the best terms. We are very close in age 11mo so we used to fight a lot when we were younger and I was mean. I was acting like any older sibling at the time and I feel bad about it. I want to help him feel better about my relationship. I want to get him something to celebrate. I thought I do a mystery box for valentines of his favorite snacks and he also loves Lilo and stitch so if I get a blueprint of stitch and paint it blue and I was gonna add little pom-pom ears and tail. Should I be worried about my parents finding out? I don’t know how they will react. I also thought painting him shoes but I’m not sure if I can get that many pairs of shoes at that price. I don’t want to get him something weird or weirdly expensive. I want to fully support him. I want him to know I’m on his side. I want him to know I have his back. I want him to feel excited. I want him to know I fully support him. I want to be happy for him. I want him to know I will be there for him. I want him to know I love him. What should I do?