Did I orgasm?

My SO has never been able to make me orgasm before and I’d never really thought about trying myself but recently I’ve been watching some porn to see if I can actually do it. Most times I’ve tried, after about 5-6 minutes my body tenses up quite a bit and I have to stop rubbing my clit, when I try again I almost rock back onto my pillow - it feels okay but not exactly how people have always described orgasms to be like so I don’t know what to think, did I orgasm or am I doing it wrong? What shall I do to improve it? I don’t even know but as soon as I try to carry on I really I have no interest in watching the porn and turn it off - what should I do? Any advice? Thanks girlies💖