First order of business: elect actual conservatives to state legislatures, AG and Secretary of State positions - and demand they prohibit the type of election shenanigans we saw in November.
I agree with you absolutely. The problem has always been though not enough true conservatives running to fill those positions. Local level as well.
Ultimately finding younger true conservatives to run would be the best case scenario. One of the local universities around here at one time had a Young Republican's Club that was very active. But after several years it died out.
IMHO the key to ending this liberal takeover is getting conservative leadership on the school boards and changing education to include conservatism; teaching true American history, American government and mandate graduation requirements to include a semester on the U.S. Constitution.
Unfortunately, this will take decades and I doubt I'll be around to see it should it be successful.
Forming a new party from the ground up I don't think will work (just my opinion); but will work would be rather infiltrating the DEM party with true conservatives that will operate under the DEM umbrella but vote conservatively.
The other problem of course is the SCOTUS being packed with liberals.