Tugged at the Heart to read your first post, and subsequent...
Been There myself, more than once, as some have also said here.
There is No pain quite like it.
Advice, you ask?
I don't give out much advice anymore; unless someone asks.
You Did.
Yeah, I got some for ya.
Don't Be Someone Other Than Who YOU Are...
Which translates as: Don't Sell All your "Knives, guns, photography, scuba, hiking, camping," Gear:
Those were Some of the Very Things that Shaped You and Made You Who You Are...
She's Taking Away Part of Your Very Heart, ...With Her;
Don't Let Her Rob You of More than that. That's Plenty 'Enuf'...
You'll Need some of those things, to Rediscover Who You Are again, "The YOU, Apart From:" your wife.
Yeah, you think you know;
But 2 Things about that:
1, You Grew Together for those most recent 17.5 YEARS of what you remember of your life;
and
2, You're thinking in a differing mindset Now, in the Trauma of LOSS, of your bosom woman, than you Will Then: When you regain your footing, and Stand on your Own. Then, you'll have More Regret to have LOSS of those very things that gave YOU some Joy in this Life, Apart From Any Other Person around You: Since you enjoyed photography, enjoyed scuba & hiking & camping; you're HERE on this Forum, so you enjoy knives & guns; then continue to ENJOY those things, for Who You Are, Not for what You only were when you were with your now-estranged wife...
I did what You did, Or, are now doing. Then I had but REGRET as a companion: And That Is NEVER a Good Thing... Yeah, you may need to downsize; I did, too; Many times over, because "the first cut" wasn't enough. But Retain Some of the BEST Things, to help Buoy You Up, for the Days ahead. Otherwise, it's like shooting Yourself in the Foot... And That is NO Way to Walk Onward...
And You Must Walk Onward. . .
Jordan Peterson's First Rule of Living: Stand Up Straight.
Be Who You Are.
Nobody Else Can Be Who You Are, and You can't be Anyone Else. Being Everyone Else is Already Taken.
Don't give up that very part of You that must help move past this Loss!
Odd Analogy perhaps, for it intimates "a perception of weakness" -- Don't even think about what it looks like to others -- But: Don't Lose by Choice the Crutches You Need to Learn How to Walk Alone Again...
With This Community; You aren't really alone.
But you will need to Relearn How to Walk Alone in your Life.
The More Regret you Retain; the More "What If I Had Done This Instead...?" you Spend Time on, is Time You will Never have Back. Face Forward, Embrace Your Future. Use Your Crutches; Learn To Walk Again... The Crutches will fall away when they are not needed in Due Time.
Find Your Peace, and Bring it Within. That may require a hike into the woods, a camp set-up with your Blades, protected by a bang-bang; and a Really Nice Photo or Ten of What Moves You "Out There," in the Wild, in God's Creation, that perhaps only Your Eyes Perceive in those moments. (And Your Camera.) Spend Time in that Creation, with Your Creator, in that Place where No One Intrudes, and No One can take away. There, is Peace; and Rebuilding of Your Soul.
Because right now, part of it has been scraped away: Uncoupled...
Never be bashful about Praying. There is One Who Hears; One Who Never Leaves You, Nor Forsakes You, Come Hell or High Water. Even if your bosom darling has left. Your Life is Not Defined By Anyone Else, or their faithfulness, or their companionship, their fickle favor or disfavor... What Defines You isn't anyone else.
There is probably a better Ending or Punchline or Takeaway to all this, but I cannot discern what that is; so for now: Breathe Deeply, rinse, repeat; and think about those places & items that give You some Peace & Joy in this Life, and don't let the current circumstances take away such Joys. You're Worth More than that.