Very warm welcome to the forums @starry. Really amazing to have a new collector join in and your enthusiasm comes through your post. Species collecting really is a work of dedication and we have a lot of collectors here who are into that. I like that despite being new, you have a goal of the species you want to collect and how you would like to start with them. Usually, having a goal is the hard part for any new collector, so it is great to see you having a framework.
There is a lot of information on the forums and you can just use the search bar to find just about any topic, or you can also just ask. You can also check out some of these links which you may find helpful to get you started:
Species collectors also have dedicated threads to share, learn and help each other. You can also check it out:
Since you also mentioned you like spreadsheets, we have the most famous spreadsheet on E4 as well:
I wish you a lot of fun on your journey with collecting. Welcome again to the forums and also to the collecting hobby. Looking forward to hearing more of your stories about your journey and your collection as it progresses.
Cheers!