Can I keep using my account as normal?
Yes, completely. Post, reply to comments, run stories, go live, DM people, everything. The campaign runs quietly underneath your normal life on the account, and your continuing to post is not just allowed, it is half of what makes growth work: we bring the right people to your profile, and your content is what they judge.
The one habit to keep small is bulk changes of your own, mainly reworking who you follow in very large batches. Keep any clear-out of your following list to roughly 100 accounts a day while the campaign is active, so the account's overall activity stays comfortably inside Instagram's limits. If you overdid it yesterday, you have not broken anything, Instagram just slows things down briefly and it passes on its own.
Everything else is yours. Change your bio, rearrange your highlights, experiment with formats, the more alive the profile looks, the better every visit we send it converts.