Erik Kostson
Ansys Employee
No worries.
It is a very challenging simulation since it involve extreme deformations and probably instabilities (wrinkling buckling of the fabric). Hence implicit solvers are not the most suited.

To be honest I think it is best to go to LS-Dyna that is used often for air bag inflation so it should cope with this (see here as an example)
Before that (going/switching to Ls-Dyna) you can try the semiimplicit command which basically switches also inside stati to an explicit when it does not converge :) - so again Explicit to the rescue :), and to aid convergence - k

Add a command snippet under the Static Structural tree branch and write:

(see apdl help for more info)

All the best of luck