First Blowjob😱

So I saw my bf on Monday morning and we went to the park. We goofed around a little then he started kissing me and sitting me on his lap. His dick was hard and I was wet but I wasn’t going to have sex with him in a park😬😂. So I gave him a blowjob for the first time and I feel like I did good but idk. It went down my throat easily and when he came (which was a surprise even when he gave a warning) I ended up gagging and swallowing not even on purpose. After that we sat there for a while and he had a hard time looking at me since he thought I wouldn’t actually do it (he always tests my limits when it comes to daring stuff). The second time around but was hard to keep it down and it seemed like he grew bigger and it was hard to swallow and deep throat.