Almost none of these measures can be unilaterally actioned by the President. They will all require Congress to pass bills. The very same Congress who have been completely incapable of addressing the biggest issues facing the country. Great ideas though and relevant in many countries in particular around a combined high school/vocational education program.
It remains to be seen how Trump will use "Executive Orders" if things don't go his way. As things are going, there's hopefully 2 groups of people in his cabinet. One to tell him what he can do and another to tell him what he cannot.
So it is indeed true that Obama altered immigration policy through executive order by changing enforcement priority to avoid deporting children, and it is indeed true that Trump will change that back. But in neither case is a President making new law by doing so: US immigration law doesn't require the administration to have or not have those priorities.