Just to keep you on the safe side. You are using
BioBizz line which is based on sugar beet so using molasses would be making your soil heavy. Too much sugars isn't really beneficial especially if you haven't established good microbial population in your soil. It's your first grow so take it easy and keep it stupid simple. Don't overcomplicate and overthink it. Get your first grow under your belt and learn from it as much as you can. First get the feel on your waterings and observing your plants. Actually get intimate with your plants so just by looking at them will let you know what they need. Once you're done with your first run you'll get the pale idea of what's growing is all about and start dialing in your environment.
Good karma!
Keep it green!