At best, with the current election results, it will be a social democratic central government with bourgeois support and influence. Members of this government from different blocs will probably not allow either party to pursue much of their bloc's usual policies. It will probably be the status quo for a few years.
How can you influence politics in a red-green direction? Well, first of all, by studying and discussing politics where you access it like in parties, over coffee with friends, at work, on social media, with family and on dates. Politics is more fun than you think and what you say after reading, taking in other people's opinions or thinking often has more influence than you think. What you say to someone, they can often pass on.
Then online voting in non-profit lobbying organizations affects more than you think. avaaz.org and skiftet.org are the best. The first covers international issues and the latter mainly Sweden. Avoid voting through several organizations, as you may be stressed by all the emails with voting proposals. But just these two I suggested are not that onerous to vote through and cover most of the important issues.