To add new peds, use fastman's limit adjuster plugin.

Here is a tutorial:

https://www.youtube.com/watch?v=KSzGUf1qMMo&ab_channel=WhamDieMoe

Add this line into peds.ide file.

***, WFOST2, WFOST2, CIVFEMALE, STAT_STREET_GIRL, woman, 1, 0, man, 1, 2, PED_TYPE_GEN, VOICE_GEN_WFOST, VOICE_GEN_WFOST
***, CWFYHB2, CWFYHB2, CIVFEMALE, STAT_COWARD, woman, 1, 0, man, 1, 4, PED_TYPE_GEN, VOICE_GEN_SWFOST, VOICE_GEN_SWFOST
***, DNFOLC3, DNFOLC3, CIVFEMALE, STAT_COWARD, woman, 3, 1, man, 10, 10, PED_TYPE_GEN, VOICE_GEN_DNFOLC2, VOICE_GEN_DNFOLC2


Don't forget to enter ID you want ped to have.