Look, you came to a taxidermy site. Most of us never used a hide frame, but we know that TANNING A BEAR SHOULD NOT BE ATTEMPTED BY A BEGINNER. The advice you got was pristine FOR TAXIDERMISTS. The "kit" you bought is 99% of the time a piece of crap dippity-do for squirrel hides. Larger animals (anything bigger than a fox) is going to be backbreaking. The very first thing you should have done was 1. Flesh it as you described and 2. Salt the hide thoroughly, roll it skin to skin, let it drain over night, shake off the salt and RESALT. The hide dies not need to dry rock hard but it dies need to have stopped puddling fluids in the salt. In a LARGE container, pour enough water to cover the hide (Notice that nowhere have I mentioned washing the hide.) Slowly add acid to the water until the pH is 2 or below. It can set in that bath for weeks if need be but at least several days. At this point, you should have a particular tan in mind(no Juju beans, antifreeze, of "kit") then follow those specific instructions. Once TANNED, a final wash in a mild soap with salty water is next. Now stretch your hide out. Since I doubt you have a 10 foot drum and hardwood sawdust, watch your hide until the skin gets "tacky". At this point you'll need to thoroughly oil your hide. Use water based oils like hand lotion. Reapply as it absorbs. Stop applying when a puddle lasts overnight. Remove the hide from the stretcher. The hide must now be "broken". That means that the skin side of the hide gets repeatedly drug across a dull edge like a dull ax blade in a vise or a fence post. You break the hide until the skin is soft and supple. A bear can take a day to several days to get it soft. Now if you want to rug it, that's a question for later.