I know it can be quite saddening here in the states. Luckily there are some methods of control that homeowners can do to slow down the invasives and help stimulate native plant growth. The book, Garden Revolution goes into greater detail but it states (and I have used this method with success) is to selectively prune back nonnatives every year while leaving the the natives along as well as planting natives with similar competitiveness so that as the invasives are drained of energy trying to regrow year after year, the natives constantly have more energy to root out, branch out, and seed out the invasives, eliminating them from our yards.
Thank you. A lot of these method are talked in even greater detail in the book, Garden Revolution. For example, the authors tell you all about proper weed whacking techniques, lists of many good native plant choices based on soil types and zone, and many excellent, environmentally friendly tips for halting invasives from hurting your garden. A 10/10 book for me.
Looks pretty sunny. If I were you, I'd turn it into a wildflower meadow. This book describes some techniques. I doubt it would be much more difficult than converting it to a grass lawn, and it would have a lot of environmental benefits as a meadow.
I just finished reading Garden Revolution last night and it has great strategies for doing exactly what you want to accomplish.
I would treat this season as a time to take stock. I would start by learning what grows naturally around you, as well as do some research for what it's locally available for plants. That will help you collect a lot of the pieces that will eventually become a site plan.
The most important factors are to check out your soil quality and figure out what kind of environment you want to emulate- prairie, woods, wood edge, etc. Figuring this stuff out early will make your efforts more worthwhile later on.
For example, I'm in Maryland, practically right next to the rock creek park system. I've got several trees on my property including two mature red maples. I've got pretty heavy clay, but it's only compacted in the first couple of inches- it breaks up fairly easily after getting through the sod.
So I'm looking for plants that do well with part shade, native to Maryland, and can accommodate (or thrive) in clay soil. That alone narrows down the field. I also have a smaller property (1/3 acre) so I'm focused on smaller, more intimate gardening, as opposed to meadowsscapes that can be accomplished on larger properties. Also, I have a serious deer issue that needs to be managed.
As a general resource, Missouri botanical gardens plant finder is invaluable. I also frequently use BONAP to check native distributions. But often it comes down to what I can actually source (check out this subs 'about' section to get started there. The list isn't everything, but it can help you get going).
As far as books go, I would read Garden Revolution . It goes over broad concepts even if the examples might but be directly applicable.
If you get your ducks in order, fall is a perfectly acceptable time to plant shrubs, and winter seed showing is also viable for a number of perennials.
Honestly, I got started by just trying to learn all the different plants in my area. Something like iNaturalist will be your friend. If you're lucky, you'll be able to cultivate something not commercially available but has made your garden its home.