Congratulations! That's a big milestone, the first ones are the most important 
I'm nearing the end of Chapter One of RetroBlade. I'm getting...increasingly excited the closer I get (just a few pages left) and also very anxious, because I still have a ton of thumb-nailing to do for Chapter Two. I don't want to go on hiatus, but I think it will be inevitable, just so I can have some peace of mind and also a tiny bit of buffer for emergencies (and family coming to stay, lol).
I do have a 23 page Prologue which I completed last year, before starting Chapter One, and I think that qualifies as my first 'Chapter'. It was amazing to finish that, especially since the nature of my story (time travel) makes beginnings the hardest thing ever to get right. I'm really proud of how I managed to pull it off and include everything I wanted to. I haven't had it printed (yet, it is the right length for a floppy I guess), but it's available as a pdf download on Gumroad, and it's going to be part of the first print book (along with Chapter One) which I'll be releasing this year ^_^
Yay!