Assuming it’s the US

• set up a fund to provide free school lunches until the government provides them
• give grants for people to set up housing co-ops
• hire my own army of Russian trolls (they do not need to be Russian, I am inclusive to all trolls) to fracture conservative unity/support progressive
• buy up some social media companies. (YouTube would be best, but I don’t the 300 billion is enough) make the algorithm progressive
• whatever is left over goes to renewables and conservation efforts