I play electric guitar. I know exactly what you mean
How long have you been playing? I have for something like a year and a half, and my teacher says I can go to conservatory in another two years probably
You really need a good teacher and a lot of willpower and interest in playing guitar if you want to become better. It takes a LOT but trust me, it's worth it, and the better you become the more fun it is to practice. You need to practice at least an hour a day if you want to have good progress. It might be a good idea to do more on the electric guitar, it's easier to get a nice sound out of it and also much more versatile.
I'm not exactly sure what you mean with an MSP patch, but there are a lot of ways to alter your guitar's sound. The most obvious is an amp with effects on it like the very good Fender SuperChamp XD which I have, it has delay, chorus, reverb, vibrato and tremolo built in, and it's preamp and clean channel are completely tube amp. Also has a dirty channel with lots of different overdrives/distortions. You can also get your own effects pedals.
Alternatively, you can use digital processing, like in Logic (Apple program for making music) and others, which can give your guitar virtually any sound you can think of by modifying it in the computer. You can also buy an analog to MIDI converter (which is maybe what you mean?), so that your guitar outputs MIDI signals which are even easier to modify on your computer, and you can make it sound like a piano or sax or whatever you want.
The only thing in the music effects world which is called MSP is the object based sound modeling language program Max/MSP, which is used to create your own sounds from scratch for digital music, so you can't use that with your guitar.
Hope this helps, and don't give up on playing guitar, I've been stuck myself often, but at that point you just need the insight of a teacher who can tell you what to do next