Finally taking the first step, but what next?

It's tough to help you lead a "cleaner life" without more details. But in general terms:

Identify things about your current lifestyle that you don't like, and then come up with plans to modify those things.

Identify things that you'd like to work towards. Make it more variable than just weight/size. Make it fun. Make a plan to get there.

Know your reasons well. Maybe you want to protect your heart or have more energy or whatever. Find what you value and what is meaningful for you. Those things keep you going even on bad days.

Learn as you go. Keep an eye out for obstacles. Pause, and figure out how you can remove them. Do you need easier recipes? Would a meal plan & weekend food prep make things easier? Do you need to ask for more support from others? Do you have feelings & thoughts that are in your way that you would benefit from working on? Are certain meals just not right for your body? Etc. Everything will be unique for you, not exactly as written in a plan or done by someone else, so you have to be mindful and flexible and adjust as you go. And not to be afraid of prioritizing these things, even if it means saying no, delaying chores, asking something of others, etc.

Aim for awesome. It's a process, so you will have hangry days and frustration and whatnot along the way. It'll take a lot of work and focus at first. But step back, evaluate, tweak, move forward. Eventually, you want meals you look forward to for which the prep is not draining, lots of energy, to be sleeping well, to be fit (however you define that) and looking forward to the activities you do, etc. It should all fit and work for you and be positive. Don't try to sustain things that don't *really* work for you indefinitely. There are other approaches, other paths, other tools. Be patient and persistent and open to new things or to altering things to find your way.