Bermuda is what I think you have. Bermuda will fill in very thick if it is fertilized regularly. I would start with a fertilizer that has metsulferon in it, that will knock out most of your weeds and get your grass going good. Do you have an irrigation system? I would not hire a company, with enough research and free time you can do a better job than any company.

Those weeds are cool season weeds that will either die or go dormant as soon as it starts to get warm. Mow the weeds if you can to keep them from going to seed for next year's bumper crop. A pre-emergent weed killer now and in September will help slow down the next batch of annual weeds. The perennial weeds can be spot sprayed with Weed-b-Gone or Roundup (carefully!) Since it's been so cold this winter I think the lawns will be slow to green up. Fertilize really well this year with high nitrogen ferts or organic fertilizer to thicken up your lawn. A thick well managed lawn will choke out most weeds. There's lots of advice and FAQs on lawn management on these forums and well worth the read.

I think it's kind of rude to comment just to tell me what I did wrong by asking for help (with plenty of detail) and using pictures that were readily available to me. If you are giving advice, which is what I asked for, these pictures are good enough. It doesn't matter on what site, on what forum- there is always one person who just HAS to pipe up to be unhelpful and critique your request instead of answering your questions. I was asking for advice on my own fledgeling plan- not asking for free design from someone. Next time if you don't have anything helpful to say, and if you can't give your thoughts nicely, just don't say anything. I'm sure it's satisfying to try to discourage new gardeners by giving your two cents about their photos, their ideas, and whatever else without giving your opinions on the questions actually posed. Going on the attack like that with the third degree, "You indicate you are new at creating a landscape, and frustrated by attempting the process of planning it. Then you go on to say how you intend to resolve it. Do you care if those ideas are good? Or you just want help in how to implement them? You might consider advice on what you ought to do instead of what you want to do." I'm not a child and am fully capable of planning and doing it on my own, thank you, I'm just here to see if a KIND person might give a few suggestions or point out something they've seen that looked nice on a similar house. Also, there is nothing wrong with being honest about what's in the cards for you (budget, time, and overall investment wise) than just wasting everyone's time. I didn't want a thread with 20 responses about how I need to limb up, thin, or remove trees in my yard. I want a thread about how to plant a line of perennials in front of my house that will look nice together. I think in my essay of a post I made that fairly clear.

It is YOUR garden and YOUR tree so you can do what you like with it. It is maybe not the best selection for that location but it is well established, appears quite healthy and has significant value. Personally, I would try to work with it as the removal of it and the other plants you noted would leave a rather bare front yard that would need substantial time to fill in and look decent. I am often called in to consult with homeowners who have inherited an existing garden they are unsure about and I tend to encourage them to leave existing plants in place provided they are 1) healthy and disease- and insect-free or not otherwise problematic (invasive, drop copious litter, etc.); 2) not obstructing walkways or driveways; or 3) not overly crowding their neighbors and not readily prunable. It doesn't necessarily make for a "perfect" garden design but typically offers a workable program that maintains an established landscape to the best of our/thier ability and reduces the effort, time and significant cost of establishing a new one. But it is always your choice :-) From the street view, the garden looks good - not great but good - and good beginning from which to just do some tweaking of the smaller plants and groundcovers. I personally would be inclined to leave the larger trees and shrubs in place...........and maybe hire a skilled ISA pruner to do some modifications to provide more definition and training/guiding of the growth of the larger choices.