So this is 1 gallon all grain kit from what I see . That means you need a pot , bag to mash in . You could lessen the bittering hops a bit or toss them in later . The problem is brewing can be overwhelming your first few times . Extract kits are probably better to start . All grain you have to mash at a certain temp and keep it there for an hour . I tend to think new brewers should start out on extract kits and follow the directions to get familiar with it , then start branching out .
If you really want to adjust this one go for it. On fruit beers its normal to add 1 to 1.25# of fruit per gallon. Ive never made a 1 gallon kit so I'm not sure how much beer would be wasted with say 1 #. I don't think you will have enough space in that , which means getting a bigger fermenter or a 2nd one . Tone down the bittering hops , chill the wort , pitch the yeast . Watch the air lock and after 3 days when the bubbling slows add your fruit ( I imagine the bottle opening is small) re attach the air lock and let it sit for 2 weeks . Check your gravity and if completed go ahead and bottle . Here's a link for priming
You've made it to bottling day. Congrats! Use this simple calculator to add the correct quantity of sugar to perfectly carbonate your beer.
www.northernbrewer.com
Also check out the 1 gallon brew thread.