What Next?

I have researched the agents I want to send my novel to and have started sending queries. With the time for agents to respond (if they do) being sometimes 12 weeks or more, I know that now it will just be a waiting game. So, what to do in this time? I know the best way to fill my writing void is to start writing something else, but it is hard to let go of my first little creation and start focusing on something different. It feels like I am subconsciously giving up on it or laying it to bed way too early. However, now that I have time (time that I will probably never have again) and now that I am in a bit of a writing routine, I know the best thing is to keep writing.

I want to go BIG this time. My first novel was easing me back into writing- a succinct 26,000 with impact. I want to try out some new things. Have a go at world-building or something like that, although I am not sure where to start. Does anyone use anything for their world-building to help them create it? Are there any useful writing tools available to help with constructing something a lot bigger? These are all just ideas at the moment, little thoughts, because I am still in the process of moving on from my last, but I do want to use this time well and keep on writing 😊.