I have a rule for people getting started, and that is don't get caught up in what's the best and what sounds like it has the most value (features, sound quality, etc.)
When you're getting started, you need a baseline. The baseline is the set of instruments (or even just one library, like Albion, Symphobia, EWQLSO) that you learn how to use and you're "set". Meaning you can write orchestral music using them, and that's your fallback level of quality for mockups and such.
Your baseline can be feature-rich and detailed (the Hollywood series) or incredibly dumbed down and easy to use (like ProjectSAM Orchestral Essentials). Once you have your baseline, and you are consciously feeling like "I'm trying to write music with a certain sound but my current set doesn't let me do it, but that other set will", only then should you start buying more libraries. For instance, let's say my baseline strings are CS2. CS2 is amazing, but it has no divisi. If I'm working on something and I need to write divisi, that's when I'm able to justify buying a library with divisi (like LASS or NISS). If I like to centerpiece a violin in my orchestra, I invest in a solo violin like Embertone Friedlander.
NEVER BUY SAMPLE LIBRARIES OR INVEST INTO FEATURES BECAUSE YOU THINK YOU'RE SUPPOSED TO HAVE THEM OR "MIGHT USE THEM LATER ON".
This is a slippery slope that never financially pans out in your favor (it may creatively, but I only give practical advice). You end up buying a metric ton of shit you never use in your music, and keep buying more when you get excited about new releases from your favorite companies to build up your "library". Don't "build up your library". I took that stance with purchasing stuff and I have bought so many thousands of dollars worth of tech I don't use and rarely have ever used outside of a single project. It's one of my biggest life regrets, actually, to be tangentially dramatic. It burns mostly because most developers employ a no resale policy, so I can't sell something when I'm done with it. It digitally follows me and stays on my Kontakt drive forever, and ever, and ever, and ever...
Start with your baseline, and buy something when your baseline doesn't cut it. As you absorb more stuff into your baseline, you use it more often because it's the sounds you really wanted, and it becomes your new baseline.
That's why amazing computer orchestrators layer different libraries. They didn't learn "layering tricks" from Daniel James on YouTube then go out and buy 3 different string libraries to stay in the game; they went through the grueling process of deciding their current libraries weren't giving them the sound they wanted, then visiting the market to find who developed a library for it.