There is a lot of good info here on STB's and Acid/Base extractions.
I know almost nothing about chemistry and started with an A/B extraction.  It really sounds complicated until you sit down and realize:
water+vinegar+mimosa
cook 3 hours, remove water/vinegar, add water+vinegar again
repeat for a total of 3 cooks
Add base until very black
add naphtha
remove naphtha
put in freezer.
That's it!
Granted it is a little more involved than that but really it is very simple. 
STB's are even simpler, but you may want to do a little research on recrystalization (which honestly is not hard either) as STB crystals can be a tad harsh.
100g is more than enough for a STB.  Just remember to use lots of water and a small amount of naphtha (like 100mL pulls).  
I'm glad you are learning to extract your own.  There is something very rewarding when you are looking a crystals that you extracted from a plant.
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