dont start with all the 500g... first extract, say, 100,  because its possible you make mistakes the first time.

STB teks like noman's tek or lazyman or similar are easy... but definitely the limonene teks seem much nicer and safer.. SWIM never tried the limonene one yet, but he definitely will when oportunity comes.  

Just a note: you do not get pure white dmt crystals with the limonene tek.. Unless you perform a recrystalization using some 'normal' solvent like naphtha/hexane/heptane in the end.   But without this recrystalization you can still get a smokeable product.. It might be a bit oily, so best would be to redissolve it in some alcohol and then infuse some herbs with it

good luck and tell us how it went