Sitting baby on highchair

Hi mummies.. My lo is turning 5 months soon. Able to hold her head up and flip over. Now she is just in that phase of trying to sit up.. I am only intending to start her on solids at 6 months if she is ready.. However I am just wondering can i make her sit up on a highchair now? Will it hurt her back or cause any issue? Just want to let her join the family in the dining table to get some exposure to the food and family mealtime.. ?