TT advice for 18mth

DD who is 18mth seems to be doing things on her own schedule, she is yet to say her first word (but has created her own sign language to get her point across) but is showing signs of being ready to toilet train. I had started to introduce the concept of a potty by putting her on it before her bath. Last week she actually wee'd in it. Since then I have moved the potty downstairs near our toilet to make it more visible. For the past month she had been tugging at her nappy whenever she wee'd or pooed. She now tugs at her nappy and runs and gets me to take her to the potty. So I consider this major progress for getting the connection between toilet and wee/poo.

My question is what do I do now? I'm quite sure by the time we get to the potty she has already wee'd but is it just time before we get to point she can tell me before hand that she needs to go. I really wasn't expecting to toilet train quite yet but I think I need to take advantage of this interest while she has it.