Forms without auto form

I am making an app that requires complex forms and has to pull data from a bunch of collections not one related to the other.

I have used autoform and there are things not yet documented like displaying some form fields via chain selects and thus i assume it is not a jo easily done by autoform.

I can create record form but its the edit form that is a problem.

How can i go about editing data from mongo db without using autoform?.

Chain selects linked here: Fluid Form; form change according to dropdown selection

Would like to know myself for convention of inserting with several inputs unlike tasks tutorial.