Im contemplating going blonde, Ive done it once before...15 years ago when I had a bit more hair

Im a medium brown now and am hoping that blonde will disguise some of the hair loss, at least for my eyes and what I see in the mirror and pictures
I bought Revlon Luxurious Colorsilk Buttercream in 73N a couple days ago, I liked that it was ammonia free.
I got my hair trimmed the other day and the girl said it was dry and somewhat damaged, I think its in good shape, maybe she wanted to sell me products, which she did try
I dont know if the lighter shade will help me disguise or make it worse, and Im also wondering about damaging or losing some of what I have