First Basic Reverb Design

Hello all,

I am trying to develop my first plugin. And I wanted to start with a Reverb, really basic. I am trying to understand the whole concept which I thought it was easy, but it kind of got a bit more complex than expected. I followed Moore algorithm design. But still my patch does not work fully. I don't know if this is a problem of the "circuit" I have built or that I just have a lack of knowledge in Max Msp programming tools. I have been researching quite a lot. But internet sometimes does not entirely help because of the loads of information. And I am not sure if I need to get that mathematically deep (i.e Fourier,RIR...) to design a really basic reverb. If somebody has some recommendations for a book, or a paper which explains how to make a basic reverb algorithm design, with maybe explanations of how its parameters works (comb filters,all pass filters, delays, feedback...) why do we need those parameters or maybe a really basic diagram to start with. That will be really helpful. Please find attach my really basic/primary patch to maybe understand in which point I am. Thank you very much in advance!