Could you check my speaking practice dictation?

This is not writtened for English writing practice. This is not an essay or diary something. I dictated my speaking in English from the record for practice and checked the grammar and vocabulary as long as I can. I'd like you to check it for grammar or vocabulary, instead of context. And give me if you have another expression, please! Thank you!

I'm back from my work now and on my laptop, watching a Youtube video and I'm gonna have a shower and go to bed because I was so tired today. Today I worked in the store for twenty hours as usual. Nothing big happened, but I felt a bit tired at the end of the day. I had dinner and watched a comedy program / a comedy show after I arrived home. I'm drinking some mint milk. This is my first day to practice my English speaking. I never practiced the English speaking. If you are curious that how I decided to practice this English speaking, I can say I decided it when I watched a Youtube video about the English study / the English study method / the method of English. So I thought I needed to practice English and I never tried to speak in English in daily life so that's why my English never becomes better. So I hope I can keep this speaking practice a day and my English will improve. I think I can do it easier, because this is not my first time for English. Even thought I haven't tried to practice to speak in English, I know I sometimes study English to write and read, so I hope I can improve my English soon.