Worried I suck at my job and feel depressed

[Bitesize89]

Just having a really bad day, I work in corporate in a consultancy and since I've started had zero training, I've been muddling through and have done ok. Good performance review and passed probation but we recently got a new system and no training was given. Just some online documents and everyone in the business complaining about lack of clarity and how much of a joke this has been. Today I found I did a mistake on one of the projects I manage. I reported that we had zero debt as I saw invoices had been paid. What I failed to see what a remaining balance on some of those invoices. Because of lack of training and clarity on new system I failed to see this. I'm incredibly embarrassed as this is the third mistake of this kind I do.i relLy am I trying but without good training I sometimes miss details or don't understand things. Am I an idiot?

You've said it yourself - everyone is pissed off with the new system and lack of training. It's an absolute false economy to cut corners with training and the company will be paying for it now because you won't be the only one making mistakes.

Seems fairly usual! We had new systems rolled out in our business from our parent business. We work differently to our parent business so it’s a nightmare’s as the are switching bits of the system off and looking for data is like needle in a haystack. We’re muddling through and then your boss gets in your back about metrics yet the data is not registering at all in he reporting outputs! No wonder there are so many lay offs when paying for an inefficient infrastructure