CRISPR is a way to edit genes, to either 'numb' them, or letting them 'over-express', so to speak.
This sounds pretty difficult, but when you know a certain gene has the same code in every plant (and with plants having a common ancester, that is pretty likely, especially because you'll only need to know something close to the first (FW), and last (RW) 16 CTAG-code combination), it would be easy to check for without doing a full sequence. You could just order some primers, PCR the genes to see if they're there (which can be done by hand if you have the time and some precise heated baths) and then do a cheap elektrophoresis (costing around 150 bucks for a set, and as little as 10 bucks per run). If the genes are present, you'd see it on the gel, ending up at the expected location compared to a known 'ladder'/control.
If you can check if the genes you'd like are present like that, there's no need for sequencing. If the gene is present, and approximately the expected size, you can copy its code from a gene-database and just order a CRISPR set with primers. This means you'll have to do some reading on genetic techniques. There might be some DIY biohacking websites that give more information, but the basis of this knowledge needs to be solid in ones mind. A simple screw up could cost you the entire project.
This technique however, is something very, very illegal if you don't have the right paperwork. I've never seen anyone fined for it, because usually the people who have this knowledge, take some form of an oath. "Genetic modification has to have no negative consequences for the world, it's inhabitants and flora and fauna, and it has to contribute in a positive way to the world."
But then again, why on earth would you do this the hard way? Why engineer a slow growing plant, why not go beyond that?!
Build a freaking DIY Tungsten nanoparticles gene gun, extract trichome RNA/dna, PCR it, and shoot it into a yeast culture? Homebrewing is hip and happening, nobody will suspect a thing! Extraction kits are readily available and I guess the genes should be known by now.
As for the hops x cannabis hybrids: protoplast fusion seems to be the way to go, but that requires radiation. Either that, or embryonic rescue if there's a possibility on actual natural fertilization.