What stocks should I sell?

Hello everyone!

I am here for some trading advice of you. My situation is as follows:

I am about to buy a house. To get a bank loan with decent interest rates I need to bring in alot of my own money. That is why I want to sell atleast a quarter or even half of my stocks. My depot consists of several Etf's and maybe two dozen single stocks. Some of my stocks did really well (like 80% – 150% gains) and some of my stocks did poorly (like 5% – 30% losses). I try to buy only “good” companies, so the reason for most of my stocks that did poorly are because I bought them at a bad timing (like at the ATH right before the current bear market). So I expect most of them to eventually get back up in the long run. Admittedly some stocks are just high risk, for example hydrogen companies like Plug Power. I dont know if they will ever rise again to their previous ATH or die out.

So as of right know I am unsure whether I should sell the stocks that are currently at a profit or the one that are currently at a loss. At the one hand I dont wanna lock in my losses with stocks that I expect to get back up again. On the other side my profitable stocks will hopefully also keep rising and I dont want to keep only “losing” stocks in my depot. But I would potentially get more money by selling less stocks if I sell my gainers. However I have to pay taxes on my gains if I sell my profitable stocks.

What do you guys think? Should I sell my winning or my losing positions or a mix of both to finance my future home?

Thanks a lot in advance!