You will don’t worry 
Glad you had a good time with MGS1. What system are you on? Been curious since the Master Collection came out how they translated the hardware-specific stuff to non-PlayStation versions of the game; I gather they rerecorded button names but what about the Pyscho Mantis stuff? (I can look it up but it’s more fun to ask here)
This is obviously your choice but it is a lot of games. Playing 1-4 is definitely manageable, but don’t let completionism burn you out before getting to the other Solid games. Maybe the Game Club will pick Metal Gear Ghost Babel later this year… (November specifically)
Neither am I but I was able to beat ZeroRanger (I died a lot). The tunes are worth sticking around for. If you do run up against any walls you can always ask for cryptic advice, maybe @TracyDMcGrath can offer some tips.