A socialist economy, just like any other, will not be simply wished into existence. It will have to be built up over time. A socialist economy, like any other, will need to be managed. In a socialist economy, selecting managers, coordinators, inspectors, and so on would have the approximate gravity of electing a government. It seems like a system of merit would be better than a system of popular election.
Socialists don't spend enough time thinking about questions like "how would technology and products and services be distributed". A common cop-out is to say that the workers in the future society will have to decide that. And so they shall, but believable socialism depends on believable plans now.
One way is a combination of market mechanisms and central / decentralized planning. Data workers, for instance would form work groups to conduct the necessary market research.
Basic needs in the various parts of a country can be derived from demographic information; information about:
A rising or falling birthrate
A rising or falling death rate
# of people within each decade of life
% of high school completion by county
% of trade school and college completion by state
# of people in the various skills pools (hospitals, railroads, warehousing, schools, farms, and so on
rate of chronic and acute diseases per county
Information about available physical resources is required: How much electricity, fresh water, natural gas, petroleum, metal ores, lumber, cement, sand, gravel, fiber, rubber, etc. is on hand or can be obtained.
A live inventory of production facilities is critical. For instance, how many canning factories are available; how many foundries; how carpet mills; how many chemical plants; how many steel mills; how many bus and railroad factories, how many clothing factories, how many pharmaceutical plants, how many food plants, etc. are available by county
Consumer research polling can determine what the interests and expectations of the population are in various regions for food, clothing, housing, education, employment, entertainment, medical care, and other preferences.
Once regional assessments of consumer needs and desires have been completed, this information can be distributed to work groups to bid on producing the needed or desired goods and services. Elected boards, assisted by work groups, would award contracts to work groups to produce goods and arrange for efficient distribution.
Needless to say, budgeting mechanisms would be required, along with the means to collect funds to finance work. Oversight needs exist to leadoff production and distribution bottlenecks, organizational failure, and so forth. An elected body of expert workers would be needed to conduct that essential oversight.
Oversight, coordination, planning, and intervention are governing activities, and before the whole process can begin, the citizens of the nation will need to authorize these governmental functions,
Socialism isn't supposed to be an austerity regime caused by ineptitude. It is supposed to deliver to its citizens the benefits produced by their labor. A successful socialist economy will succeed in delivering a fair distribution of goods to everyone. Does that mean that everyone can expect a luxury car, a big house, and expensive gadgetry? No. Needs and wants have to be satisfied within a long-range view of sustainability and fairness (something that ardent capitalists would rather not do).
What people should expect is that their needs for decent food, clothing, and shelter will be met; that they have the tools they need to achieve their aspirations (meaning education in its various forms). New technology must not be the possessions of the privileged; it must be made available on a shared basis fpr everyone. (Needless to say, socialists take a dim view of the existence of any privileged class.).
In a nutshell, start with good information and stay with good information to the end.