Need self bondage help/advice. Any idea how to restrain myself so my hands are free to use laptop but I can’t reach my crotch?

Hi - I’m 18. I’ve never done self-bondage but I’ve watched porn before and I’ve been visiting a lot of sites the last few days. I’ve also been chatting every night with my fellow redditors about my fantasies and have had a great time. A couple days ago a guy sent me a vid of some poor girl in bondage being subjected to orgasm denial and it’s the hottest thing I’ve ever seen. I don’t have a partner to do this so I thought why not do it myself? I want to be restrained in so I can’t reach my pussy but my hands are free to use my computer. I’m thinking tied to a chair at my desk. The important part is my hands must not be able to go down and it would be nice if they can reach my nipples too. I have a hard time cumming. It usually takes a while with a lot of stimulation and dirty thoughts/fantasies are usually necessary. My plan is to put a vibrating egg on my clit and tape it there. Set it on a setting that will never get me off. Go on dirty chat pals and let everyone know and then chat with cruel redditors who tease me or send me porn while I can’t get over the edge. Trouble is how do I do this. I don’t have any material but there is a fetish store in my town so I can get cuffs/chain etc and I have an ice lock and a fail safe for release. Plan is to use chain to keep me in my chair and legs spread and then cuff hands to something above so they can move but can’t go down far enough to reach my clit or the vib setting. Problem is I can’t think of anything to chain my hands to that fit my needs. Any ideas? This is a basic teenage girls bedroom. Regular bed/desk a chair and beanbag. I will be alone in the house for a few hours each day so I could go elsewhere if there’s a better setup. It’s a big suburban house. The garage has rafters for storage I could use but although it’s attached there’s no heat so it’s about 45 degrees in there so I would prefer not to use it. Any ideas collective mind of Reddit?