If your trading plan is working - STICK TO IT! If it’s not working, modify/change it until it does.
Pardon me, but if you modify/change your plan every time it isn’t “working” then it’s not much of a plan, just something you make up as you go along.
Obviously there must be some testing period to determine when the plan fails or when it simply delivers built-in, acceptable losses.
Why don’t you start by running a demo account alongside your live account? You could then place your trade on the demo account and one, two or three candles later, place the same trade on the live account [I]only if it’s going your way[/I]. This is a gentler introduction to live trading and although you may miss a few pips at the beginning of the successful trades, you will certainly avoid a few losing trades completely. As your confidence grows, you can ditch the demo account.
I have also used the demo account to control my ‘trigger-happiness’ when I’m desperate to get into a trade but a little voice is telling me to wait. I ‘scratch the itch’ by opening the trade in the demo account and then either jump in quickly with a live trade as it starts to go my way or watch happily as the price goes against me and I place my live trade at a better entry point (if I still believe in the setup). I do not consider this ‘adding to a losing position’ as I have yet to place my first live trade!
Good luck, but never forget that you are trading against others who believe exactly the opposite of what you do at that point in time. It will keep you humble.
you will be fine, do not get intimidated with the live platform, relax and stick to the basics, the thing with live is most likely execution differences and spreads, mental pressure 
just make sure when you set a trade and set your SL and TP do not change it no matter what happens, accept loses then forget them then start over, best of luck.