Well, I you are only playing for 48 days, starting out with one pattern sure will give you something to focus on an train finger independence, accuracy, fingerings, timing etc.
I always wanted to be able to do what you described and I can assure you, it comes with time
Just like strumming patterns, chord variations and embellishments, picking patterns are tools in your toolbox to express yourself.
My students often could use some help in “making a song their own and express themselves with it in a personal fashion”. Trying a (new) fingerpicking pattern is an excellent way to steer from a day full of strumming but the beginnings can be slow and frustrating.
Starting with one pattern is the way to go but please, pick up some extra patterns as you move along. When you dissect a song you could use every strumming or picking pattern or just one for every song but that last one will become boring soon.
One big consolidation; as soon as you get a bit of a hang of it, learning a second pattern is easier because you don’t need to start over with the technical and physical basics. that’s what makes learning the first one a hurdle.
After a while, you can let your hand do these things automatically while you aren’t looking, singing, looking for chords on a paper, …and go “something like this: …dingle dingle ding”
Many songs use one pattern with some “decorations” and chord embellishments along the way but there are many patterns out there. Some will come easy but some will harder to pick up and often that is personal. I had some trouble picking up “The Boxer” (Paul Simon) even though I was pretty fluent with finger picking already.
I often recommend “Dust In The Wind” because it will not only train your picking, it will show you that it might sound complex at first but the intro is basically several flavours of Cmaj and Amin and repeating pattern.