I get it. Here's my two cents.. find a few target companies and start reaching out to people in their marketing teams for guidance. Cozy up to them and make genuine connections. Give this a few months, and then go in for the kill. Ask for a referral, have a project ready (ideas, competitor campaign breakdowns etc.)
Alternatively, move to a seed / series A with a strong marketing leader who you can work under. It's easier to break in via startups than bigger companies.
Fyi, HPE has far from the best sales team culture. If you want to give software sales a few more years to make money, look for an international majority company with limited employees in India. They have the best culture.