In a comment you state that your requirement is to "shoot some birds and flowers". The zoom length of the P1000 is ridiculous for that and comes at a considerable cost in price, weight, and image quality in direct conflict to your comment-stated requirement of "maximum possible quality photos in a less investment" [sic]. The P1000 is far too heavy to handle birds in flight reasonably and the lens is pretty slow on most focal lengths, too. The image quality is that of a small sensor.
Superior image quality for a compact but comparatively large weight and size and hefty price will be the Sony RX10IV with a 1" sensor. Panasonic has the DMC-FZ330 in its lineup which also has 600mm equivalent focal length but a 1/2.3" sensor that is kept down to 12MP while the lens has f/2.8 over its entire zoom range. That's good for a lot of keepers in reasonable quality at moderate size and weight. The longer range DMC-FZ80, in contrast, has a slower lens and 18MP on a same-size sensor. People are generally in agreement that it's not a good deal for image quality unless you absolutely need the zoom range.
For flowers, 600mm is excessive (you'd usually use a closeup lens in order to get reasonable focusing distances) since flowers don't scare easily. For birds, it will still accomplish a lot.
A P1000 is not useful for much more than moon shots or capturing static wildlife from a distance (and we are not talking zoo distances here but countryside), using a tripod. Maybe try renting one for a week or so to get a hang of what it is or is not good for.