There is a project: multi step form. It has login form, text field, date, upload. It is written in jQuery, Zend and oracle. I need to rewrite. I can use my familar jQuery, PHP skills. Or I can go for react redux, build API with Zend. The issue is that I only have 2 months. Very basic knowledge of react, redux webpack. So I need to learn and build the project. Should I go for new tech. I am not sure I can reach deadline, as there are many things to learn. Advice? If i use the new tech, how do I learn quickly?

On a deadline I'd go with what I know, leaving learning for side projects, even if you learn fast enough to solve most problems you'll probably won't be sure if you did it the best way.

There is one more thing I want to add. I went through lots of interview. They always ask react Redux. I see this deadline project as a chance to try out. Otherwise I will never have commerical experience of react and won't able to find a front end job. Because I am tied of sticking declined tech. Also the UI is somewhat complex, it is a win to use react, but I just have time issue. I have a feeling that if I use new tech I will lose this job. I also have a feeling that if I don't use react, I will regret. Advice?

If you are already understanding the basic concepts of programming you will be fine doing some form stuff in 2 months. Just get to work and do it.

To the regretting part: if you will not use the technologies mentioned that will be a problem. Just use them another time, when you think it's a fit.

To the actual situation: why do you have to rewrite it and what will be the best solution to that particular problem? If you answered that question to yourself you know what you should do.

build first a quick & dirty react demo in 3 days and have look on how it goes?

2 months seems like a lot of time to be honest. 1 week to learn react, 1 week to code it. If that fails you still got 1.5 months to do it the usual way.