The Manfrotto 190 graphite 4 section tripod would be a great place to start. They are reliable and easy to use. And having a good quality small easily transportable tripod means you will use it. I find I sometimes leave a tripod at home or in the car and end up with not the best results just because I was too lazy to bring it, or couldn't be bothered. Having one that you will always have with you, even if you don't need it is the best tripod to have in your kit. And then maybe have a bigger, heavier nore stable one as a backup tripod eventually.

Photoshop Elements will get you started relatively cheaply, but the software that comes with the camera can do everything to produce a good image. There is a very steep learning curve with software and you have to invest the time in it if you want to master Photoshop, NIK, OnOne or any software.

Elements is a very good product, inexpensive and an industry format and standard that starts you off very well and points you in the right direction if this hobby starts consuming your life, like it has for a lot of people.

You have have your lens and camera sorted, get them, use them. And maybe start a new thread with an image and ask what tripod, flash or PP technique or software may improve this image.