Instead of spending money, you can use that money to travel more, and find interesting subjects.
Ok, there are a few things that help you. Decent rechargeable batteries. Maybe a spare set. A large fast memory card.
Tripods can be fun, but I wouldn't spend more on it than on the camera! Surprising what tripods you can find in Nature. Backpack? I don't bother. Like to travel light - but a good strap is a bonus.
Not heard of any issues - looks like a fairly typical modern digital bridge camera. You can have a lot of fun with them. Does it have any manual controls over shutter and aperture? If so, then it's a good stepping stone should you chose it to be.
My gf was kind enough to ensure it has an 8GB card. Fast enough for me.
The tripod is a must. I have RSI which translates to having a shaky hand when doing some thing. Not an issue for me, but others notice if I hand them a hot cup. Let just say I'll never be on Danger UXB if they do a re-make.
Charger, batteries, spare set. Check!
No manual shutter or aperture, but there seem to be modes to work around that, as well as adjusting the light, and the ISO settings.
I love the ghoul pic in that link. Not so sure about the mushroom though.