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.

***, OFYRI2, OFYRI2, CIVFEMALE, STAT_STREET_GIRL, woman, 1000, 0, null, 2, 7, PED_TYPE_GEN, VOICE_GEN_OFYRI, VOICE_GEN_OFYRI
***, HFOST2, HFOST2, CIVFEMALE, STAT_STREET_GIRL, woman, 4, 0, man, 9, 3, PED_TYPE_GEN, VOICE_GEN_HFOST, VOICE_GEN_HFOST
***, BFYST2, BFYST2, CIVFEMALE, STAT_STREET_GIRL, woman, 183, 0, null, 0, 3, PED_TYPE_GEN, VOICE_GEN_BFYST, VOICE_GEN_BFYST
***, BFYJG, BFYJG, CIVFEMALE, STAT_COWARD, jogwoman, 1000, 0, beach, 9, 9, PED_TYPE_GEN, VOICE_GEN_WFYJG, VOICE_GEN_WFYJG

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