Has anyone had an experience in building a new house?

We bought a house 6 months ago, but we regret not building one… so now are plan to sell our current house and build our new one. has anyone done this before? we are unsure how this process goes. since we will need two loans at the same time.. we plan to live in the current house until the new home is finished and ready to live in..

We will need a construction loan, and we have a standard mortgage now. thanks in advance.