Assuming you ordered the 3891 without a discrete GPU, then your PSU is probably 260W. The 1050 Ti requires 300W. For systems that were ordered with a discrete card the PSU was 360W. For the smaller PSU a GT 1030 would work where as for the larger PSU you could go up to a GTX 1650 Super or GTX 1660 Super as shown here in the specs. Now having said all that this video shows a GPU upgrade to a 1650 with the 260W PSU. So according to the video you can throw out the specs as listed and follow the video recommended GPUs. Totally confused yet, it can be. But the author of the video states that the 1650 will run properly with 260W PSU so a 1050 should be fine and yes a low profile.
Can I upgrade GPU to Nvidia GeForce GTX 1050 Ti 4 GB ? Should be a low profile card ?
GPU upgrading - Dell Inspiron 3891 i-3 10105 CPU 3.7 GHz, 8 GB RAM