Have you already decided that your system will use indicators, then? (I’m asking just to check that you realise that many systems don’t, and some people do find those easier and/or better).
A very good book, which will certainly help you (just as it’s previously helped countless others in your position, or a little bit further on than your position) is called Beyond Technical Analysis: How to Develop and Implement a Winning Trading System”, by Tushar S. Chande.
And this post, which has also helped other people, (click the words in green, below) may also help you, soon -
And welcome to Babypips!