PKD wasn't wild or weird, just strange and stooped in reality. He did drugs, only acid like twice from what I've read, as he was mainly into stimulants like amphetamines. Try William S. Burroughs for wild fiction, it's not just that he was a weirdo, his plots and storylines are out there as well. Lovekraft wasn't a good writer and couldn't implement dialogue realistically, Poe was also dark and macabre, but less supernatural, with more focus on theme.
If you're gonna read Dick don't do Ubik, it's mostly sci-fi and is only moderately mind bending. Most of his stuff takes place in either 60's or futuristic California, granted the whole "paranoid sci-fi computer programming" thing gets kind of trite after a while. The world isn't as helpless as it might seem, like Randolph Cater searching for the lost city of his dreams and never being able to find it or reach it. Just jump straight into the Exegesis to see what his platform and background was for his stuff. Because MITHC wasn't really awkward or as strange, it's mostly just sci-fi.