Question about ProArt GeForce RTX 4070 OC - 647483

I bought a Captiva R56-565 (AMD Ryzen 7 3700X, 32 GB, 2000 GB, SSD) I would like to upgrade to an ASUS ProArt GeForce RTX 4070 OC . Would it fit? Could I run it on my power supply? And in the case of problems can I expect help from digitec ? And what type of support I can