... Is how far I have read. Spoilers Ahead!
There is a few parts to this that I have read so far.
Part 1 starts over 20 years before the attack on the planet and consists of the MC gathering resources $¥€¢£ to keep the economy from crumbling to dust. This consists of a number of times where luck could turn either way and while knowing he would "win", it still caused some excitement in me when what needed to happen, did happen.
Part 2 is where he really starts picking up on training himself. He has gathered the capital funds and purchased the land the early dungeons are at and has gone into and cleared who knows how many of them. I'd say this lasted about 10 years in the book tho he doesn't look like it has (awakener ability I guess).
Part 3 has him giving the final preparation details to even those not in the know which prevents catastrophic measures from occurring and saves tons of lives in the process. This is also when the test site is finally opened and probably 6% of the population was swept away by the system to the site.
I'm pretty sure part 1 finishes around 60-70 chapters in, but it could be that that is when part 2 finishes. Don't blame me for inaccurate information, I'm only human.
By the way, he's doing everything for his family and is Always trying to stay out of the public eye. Partially to protect his family and partially because he really doesn't want the attention. He will wield his authority like a sword when needed and cause others to submit. It's a balance between "Here is the benefit, come join me." and "Give in. You can't compete against me."