HSCShop, for offers just go straight to the cam programs (Chaturbate, Stripchat, LiveJasmin) and pick revshare over PPS while you learn what your traffic is worth. They convert on almost any adult traffic.
For traffic, tube embeds w/ unique titles and a daily posting rhythm is the cheapest start, plus thumb/banner trades with sites in the same niche. Paid popunders will just eat your budget before you know your EPC imo.