Need help on advanced Tratak meditation

Hi guys I’m new in this forum.I’ve been practising tratak for a month now for 1 hour daily and it really has impoved my concentration.Recently I saw a few articles on the net saying it is possible to do tratak on tip of the nose even while walking and during everyday work.But the problem is I can’t see the tip of my nose when I look down.Anybody here who can help me with nose tip tratak?And anybody knows how to do tratak on the 7 chakras?Thx.

I’m also looking for similar advise.

So far, in terms of books, the best one on the topic is Dharana Darshan. In this book there are over 40 pages dedicated to Trataka alone…