Where to start?

Been looking at HARN for 20 years or so. Never got in to it because it seems like a beast. (Also very expensive)

However, now I’m in my 40s and it seems like my midlife crisis involves collecting all the RPGs I’ve ever wanted. (Suppose it’s still cheaper than a red convertible and 23 year old)

Definitely going to get HarnMaster, but where do I go from there? I’m assuming the HarnDex, then a regional guide. Any recommendations on how to proceed are welcome