>how would I best start off in creating it?
Join a group of like minded and serious men IRL. I don't mean a group of memers, I mean people who are willing to die for their people. If such a group doesn't exist, make it if you're that type of person. I'm currently stuck at this stage. I don't think you should even consider running for president unless it's a super well-organized publicity stunt, the jews will never let you win and there is little to no chance of a democratic solution (which isn't to say that a group should not dedicate some resources to democratic politics especially since the people have faith in the system to some degree and view it as legitimate. The platform of elected office is important, more important than many people may think.
>how long would it take to achieve it, considering changing laws and getting to a position of power takes its time?
I have no idea, that really depends. I'm of the belief that the lemmings won't wake up until they are living in conditions that are intolerable to them (likely in a material sense) and the current ZOG becomes unable to continue as it has been. This is Lenin's "law of revolution" and I believe it to be very accurate personally, regardless of the source. Lemmings won't break from the status quo as long as it is dangerous for them to do so and the radical alternative can't serve them better than the status quo under ZOG.
>how to I best deal with invaders?
Assuming you are talking of being in a position of power, the first thing to do is to redefine what it means to be a citizen of your country, whether this be according to ethnic group or a broader racial category (as would have to be done in America). After that one could begin deportations and incentives for these people to leave. In America at least there are many problems in the removal sense due to the sheer number of shitskins so balkanization and territorial segregation are viable alternatives.
>would abolishing a multi-party and parliament system be beneficial?
The party system needs destroyed, as does democracy in general. Dividing the people into parties breaks our internal unity and sets us into factions warring against each other. Only (((they))) can benefit. Participatory centralism is the most redpilled position. There is a group of people (likely experts in certain fields) who can all voice their opinions on a matter and ultimately it is the leader who makes the final decision.
I'll answer more later if you want