How do I go about identifying and tackling the fears or psychological blocks that prevent me from taking action? For example, fear of losing money, etc.

Hmm you may need to take small steps in building confidence in taking on investments. Small wins and profits will help you reach a higher level and reduce the fear you have. Hope this helps

What is your intial feeling when your counter turns red? How about when your counter turns green? Those feelings can create impulse buying/selling which will affect your potential returns. You have to recognise the problem and set limits to yourself, eg. If you want to have a transaction, have 1 day cooldown/observation first to make sure your thoughts are rational. Alternatively, predecide on stop/limit orders so you woulnd't sell/buy in the heat of the momment.