If it were me and I wanted to split phase 1:
1a: case, beads, a119 (you'll be able to process your guitar and use the envelope follower and comparator to modulate beads)
1b: maths, sbg
another thing that you may want sooner rather than later is a way to control the modular with your foot - especially if you are playing guitar into it... addac and doepfer make one and there is a diy one available from thonk by a company called 7 dials
look at them carefully though, as you may find that you already have all you need other than the module to get that to work - usually a passive volume pedal - but iirc some of them can also take a switch
"some of the best base-level info to remember can be found in Jim's sigfile" @Lugia
Utility modules are the dull polish that makes the shiny modules actually shine!!!
sound sources < sound modifiers < modulation sources < utilities